diff --git a/mindspore/lite/src/ops/adder.cc b/mindspore/lite/src/ops/adder.cc
index e43bd1b10e8..6320c48cb99 100644
--- a/mindspore/lite/src/ops/adder.cc
+++ b/mindspore/lite/src/ops/adder.cc
@@ -21,7 +21,7 @@
 #include "include/errorcode.h"
 #include "src/common/log_adapter.h"
 #ifdef PRIMITIVE_WRITEABLE
-#include "tools/converter/quantizer/quantize_util.h"
+#include "src/param_value_lite.h"
 #endif
 
 #ifndef PRIMITIVE_WRITEABLE
diff --git a/mindspore/lite/src/ops/conv2d.cc b/mindspore/lite/src/ops/conv2d.cc
index b1961c234bd..3bb9fa81e64 100644
--- a/mindspore/lite/src/ops/conv2d.cc
+++ b/mindspore/lite/src/ops/conv2d.cc
@@ -24,7 +24,7 @@
 #include "src/common/log_adapter.h"
 #ifdef PRIMITIVE_WRITEABLE
 #include <float.h>
-#include "tools/converter/quantizer/quantize_util.h"
+#include "src/param_value_lite.h"
 #endif
 
 #ifndef PRIMITIVE_WRITEABLE
diff --git a/mindspore/lite/src/ops/deconv2d.cc b/mindspore/lite/src/ops/deconv2d.cc
index 1605a12a0b5..d6878602ed0 100644
--- a/mindspore/lite/src/ops/deconv2d.cc
+++ b/mindspore/lite/src/ops/deconv2d.cc
@@ -21,8 +21,7 @@
 #include "src/common/log_adapter.h"
 #ifdef PRIMITIVE_WRITEABLE
 #include <float.h>
-
-#include "tools/converter/quantizer/quantize_util.h"
+#include "src/param_value_lite.h"
 #endif
 
 #ifndef PRIMITIVE_WRITEABLE
diff --git a/mindspore/lite/src/ops/depthwise_conv2d.cc b/mindspore/lite/src/ops/depthwise_conv2d.cc
index 19a626fe3f7..ad5bef82133 100644
--- a/mindspore/lite/src/ops/depthwise_conv2d.cc
+++ b/mindspore/lite/src/ops/depthwise_conv2d.cc
@@ -19,7 +19,7 @@
 #include <memory>
 #include <string>
 #ifdef PRIMITIVE_WRITEABLE
-#include "tools/converter/quantizer/quantize_util.h"
+#include "src/param_value_lite.h"
 #endif
 #ifndef PRIMITIVE_WRITEABLE
 #include "src/ops/ops_register.h"
diff --git a/mindspore/lite/src/ops/matmul.cc b/mindspore/lite/src/ops/matmul.cc
index bd11e88fd8e..9e50dc222eb 100644
--- a/mindspore/lite/src/ops/matmul.cc
+++ b/mindspore/lite/src/ops/matmul.cc
@@ -18,7 +18,7 @@
 #include <memory>
 #include <utility>
 #ifdef PRIMITIVE_WRITEABLE
-#include "tools/converter/quantizer/quantize_util.h"
+#include "src/param_value_lite.h"
 #endif
 
 #ifndef PRIMITIVE_WRITEABLE
diff --git a/mindspore/lite/src/ops/maximum.cc b/mindspore/lite/src/ops/maximum.cc
index 15899974d29..1d17d3e6551 100644
--- a/mindspore/lite/src/ops/maximum.cc
+++ b/mindspore/lite/src/ops/maximum.cc
@@ -19,8 +19,7 @@
 #include "src/common/log_adapter.h"
 #ifdef PRIMITIVE_WRITEABLE
 #include <float.h>
-
-#include "tools/converter/quantizer/quantize_util.h"
+#include "src/param_value_lite.h"
 #endif
 
 #ifndef PRIMITIVE_WRITEABLE
diff --git a/mindspore/lite/src/ops/maximum_grad.cc b/mindspore/lite/src/ops/maximum_grad.cc
index cbe6a46428e..634e4d5853a 100644
--- a/mindspore/lite/src/ops/maximum_grad.cc
+++ b/mindspore/lite/src/ops/maximum_grad.cc
@@ -19,7 +19,7 @@
 #include "src/common/log_adapter.h"
 #ifdef PRIMITIVE_WRITEABLE
 #include <float.h>
-#include "tools/converter/quantizer/quantize_util.h"
+#include "src/param_value_lite.h"
 #endif
 
 #ifndef PRIMITIVE_WRITEABLE
diff --git a/mindspore/lite/src/ops/minimum_grad.cc b/mindspore/lite/src/ops/minimum_grad.cc
index 73c66aa836b..6c5df183f56 100644
--- a/mindspore/lite/src/ops/minimum_grad.cc
+++ b/mindspore/lite/src/ops/minimum_grad.cc
@@ -19,7 +19,7 @@
 #include "src/common/log_adapter.h"
 #ifdef PRIMITIVE_WRITEABLE
 #include <float.h>
-#include "tools/converter/quantizer/quantize_util.h"
+#include "src/param_value_lite.h"
 #endif
 
 #ifndef PRIMITIVE_WRITEABLE
diff --git a/mindspore/lite/src/ops/primitive_c.cc b/mindspore/lite/src/ops/primitive_c.cc
index 991ca08ed10..0ad8da75566 100644
--- a/mindspore/lite/src/ops/primitive_c.cc
+++ b/mindspore/lite/src/ops/primitive_c.cc
@@ -387,7 +387,9 @@ void PrimitiveC::set_input_quant_params(const std::vector<std::vector<schema::Qu
 }
 
 void PrimitiveC::set_input_quant_param(const size_t &index, const std::vector<schema::QuantParamT> &input_quant_param) {
-  MS_ASSERT(index < this->input_quant_param_.size());
+  if (index >= this->input_quant_param_.size()) {
+    this->input_quant_param_.resize(index + 1);
+  }
   this->input_quant_param_.at(index) = input_quant_param;
 }
 
@@ -493,7 +495,7 @@ std::shared_ptr<PrimitiveC> GetTupleGetItemPrim() {
 }
 
 template <typename T, typename = std::enable_if<std::is_base_of<PrimitiveC, T>::value>>
-std::shared_ptr<PrimitiveC> NewPrimitiveC(const Primitive &prim, const std::vector<AnfNodePtr> &inputs,
+std::shared_ptr<PrimitiveC> NewPrimitiveC(const mindspore::Primitive &prim, const std::vector<AnfNodePtr> &inputs,
                                           const schema::QuantType &quantType) {
   auto primc = std::make_shared<T>();
   if (primc == nullptr) {
diff --git a/mindspore/lite/tools/converter/anf_transform.cc b/mindspore/lite/tools/converter/anf_transform.cc
index b4743fb6992..2b3296fa162 100644
--- a/mindspore/lite/tools/converter/anf_transform.cc
+++ b/mindspore/lite/tools/converter/anf_transform.cc
@@ -204,7 +204,7 @@ FuncGraphPtr AnfTransform::TransformSingleFuncGraph(const FuncGraphPtr &old_grap
       ReturnCode::GetSingleReturnCode()->UpdateReturnCode(RET_ERROR);
       return nullptr;
     }
-    this->mQuantizer = std::make_unique<quant::WeightQuantizer>(new_graph, config->quantWeightSize,
+    this->mQuantizer = std::make_unique<quant::WeightQuantizer>(new_graph, config->configFile, config->quantWeightSize,
                                                                 config->quantWeightChannel, config->bitNum);
     if (mQuantizer == nullptr) {
       MS_LOG(ERROR) << "New WeightQuantizer failed";
diff --git a/mindspore/lite/tools/converter/converter.cc b/mindspore/lite/tools/converter/converter.cc
index 9d4a665b0af..09c9049bd38 100644
--- a/mindspore/lite/tools/converter/converter.cc
+++ b/mindspore/lite/tools/converter/converter.cc
@@ -32,8 +32,6 @@
 #include "tools/anf_exporter/anf_exporter.h"
 #include "tools/anf_importer/import_from_mindir.h"
 #include "proto/onnx.pb.h"
-#include "tools/converter/quantizer/post_training_quantizer.h"
-#include "tools/converter/quantizer/quant_cast.h"
 #include "include/version.h"
 
 namespace mindspore {
diff --git a/mindspore/lite/tools/converter/legacy_optimizer/graph/tensor_name_pass.cc b/mindspore/lite/tools/converter/legacy_optimizer/graph/tensor_name_pass.cc
index 566709a848e..b0789675376 100644
--- a/mindspore/lite/tools/converter/legacy_optimizer/graph/tensor_name_pass.cc
+++ b/mindspore/lite/tools/converter/legacy_optimizer/graph/tensor_name_pass.cc
@@ -16,7 +16,6 @@
 
 #include "tools/converter/legacy_optimizer/graph/tensor_name_pass.h"
 #include "tools/converter/converter_context.h"
-#include "tools/converter/quantizer/quantize_util.h"
 #include "tools/common/tensor_util.h"
 
 namespace mindspore::lite {
diff --git a/mindspore/lite/tools/converter/quantizer/CMakeLists.txt b/mindspore/lite/tools/converter/quantizer/CMakeLists.txt
index b37f7dc3fb3..176ce6a7171 100644
--- a/mindspore/lite/tools/converter/quantizer/CMakeLists.txt
+++ b/mindspore/lite/tools/converter/quantizer/CMakeLists.txt
@@ -6,7 +6,6 @@ include_directories(${3RD_DIR}/opencv/build/include/opencv4)
 file(GLOB QUANTIZER
         ${CMAKE_CURRENT_SOURCE_DIR}/calc_quant_param.cc
         ${CMAKE_CURRENT_SOURCE_DIR}/quantizer.cc
-        ${CMAKE_CURRENT_SOURCE_DIR}/aware_quantizer.cc
         ${CMAKE_CURRENT_SOURCE_DIR}/quantize_util.cc
         ${CMAKE_CURRENT_SOURCE_DIR}/post_training_quantizer.cc
         ${CMAKE_CURRENT_SOURCE_DIR}/quant_cast.cc
diff --git a/mindspore/lite/tools/converter/quantizer/post_training_quantizer.cc b/mindspore/lite/tools/converter/quantizer/post_training_quantizer.cc
index 825fab53cad..202c5784df0 100644
--- a/mindspore/lite/tools/converter/quantizer/post_training_quantizer.cc
+++ b/mindspore/lite/tools/converter/quantizer/post_training_quantizer.cc
@@ -39,6 +39,7 @@
 #include "tools/common/tensor_util.h"
 #include "src/common/file_utils.h"
 #include "src/common/utils.h"
+#include "tools/converter/quantizer/weight_quantizer.h"
 
 using std::string;
 using std::vector;
@@ -380,182 +381,16 @@ STATUS Calibrator::AddQuantizedOp(const CNodePtr &node) {
   return RET_OK;
 }
 
-void Calibrator::AddImage(const string &file, size_t index) {
-  if (index >= images_.size()) {
-    MS_LOG(ERROR) << "images_ size: " << images_.size() << " but index: " << index;
-    return;
-  }
-  auto exist = [](const string &file) {
-    struct stat buf {};
-    return stat(file.c_str(), &buf) == 0;
-  };
-  if (exist(file)) {
-    this->images_[index].push_back(file);
-  } else {
-    MS_LOG(WARNING) << "invalid image file path: " << file;
-  }
-}
-
 STATUS Calibrator::GenerateInputData(size_t input_index, size_t image_index,
                                      mindspore::tensor::MSTensor *tensor) const {
-  MS_ASSERT(tensor != nullptr);
-  if (input_index >= images_.size()) {
-    MS_LOG(ERROR) << "images_ size: " << images_.size() << " but input_index: " << input_index;
-    return RET_ERROR;
-  }
-  if (image_index >= images_[input_index].size()) {
-    MS_LOG(ERROR) << "images_[input_index] size: " << images_[input_index].size()
-                  << " but image_index: " << image_index;
-    return RET_ERROR;
-  }
-  string path = images_[input_index][image_index];
-  MS_LOG(INFO) << "read image: " << path;
-  size_t size;
-  char *bin_buf = ReadFile(path.c_str(), &size);
-  if (bin_buf == nullptr) {
-    MS_LOG(ERROR) << "ReadFile return nullptr";
-    return RET_NULL_PTR;
-  }
-  auto data = tensor->MutableData();
-  if (data == nullptr) {
-    MS_LOG(ERROR) << "Get tensor MutableData return nullptr";
-    return RET_NULL_PTR;
-  }
-  if (size != tensor->Size()) {
-    MS_LOG(ERROR) << "the input data is not consistent with model input, file_size: " << size
-                  << " input tensor size: " << tensor->Size();
-    return RET_ERROR;
-  }
-  auto ret = memcpy_s(data, tensor->Size(), bin_buf, size);
-  if (ret != EOK) {
-    MS_LOG(ERROR) << "memcpy_s error: " << ret;
-    delete[] bin_buf;
-    return RET_ERROR;
-  }
-  delete[] bin_buf;
-  return RET_OK;
+  return CopyInputDataToTensor(input_index, image_index, images_, tensor);
 }
 
 STATUS Calibrator::CollectImages() {
-  this->images_.resize(config_param_.image_paths.size());
-  auto input_i = 0;
-  bool multi_input = config_param_.image_paths.size() > 1;
-  for (const auto &image_path : config_param_.image_paths) {
-    DIR *root = opendir(image_path.c_str());
-    if (root == nullptr) {
-      MS_LOG(ERROR) << "invalid image path: " << image_path;
-      return RET_PARAM_INVALID;
-    }
-    struct dirent *image_dir = readdir(root);
-    size_t count = 0;
-    while (image_dir != nullptr) {
-      string file_name(image_dir->d_name);
-      if (file_name != "." && file_name != "..") {
-        const std::string file_path = image_path + "/" + file_name;
-        if (multi_input || config_param_.batch_count == 0) {
-          this->AddImage(file_path, input_i);
-          count++;
-        } else if (count < config_param_.batch_count) {
-          this->AddImage(file_path, input_i);
-          count++;
-        } else {
-          break;
-        }
-      }
-      image_dir = readdir(root);
-    }
-    std::sort(images_[input_i].begin(), images_[input_i].end());
-    if (config_param_.batch_count != 0 && config_param_.batch_count < images_[input_i].size()) {
-      images_[input_i].resize(config_param_.batch_count);
-    }
-    closedir(root);
-    input_i++;
-  }
-  return RET_OK;
+  return CollectCalibInputs(config_param_.image_paths, config_param_.batch_count, &images_);
 }
 
-STATUS Calibrator::ReadConfig() {
-  if (config_path_.empty() || config_path_.length() > PATH_MAX) {
-    MS_LOG(ERROR) << "invalid config path!";
-    return RET_PARAM_INVALID;
-  }
-  // check whether config file path is valid
-  char *resolved_path = new (std::nothrow) char[PATH_MAX]{0};
-  if (resolved_path == nullptr) {
-    MS_LOG(ERROR) << "New an object failed.";
-    return RET_ERROR;
-  }
-#ifdef _WIN32
-  if (_fullpath(resolved_path, config_path_.c_str(), 1024) != nullptr) {
-    config_path_ = string(resolved_path);
-  }
-#else
-  if (realpath(config_path_.c_str(), resolved_path) != nullptr) {
-    config_path_ = string(resolved_path);
-  }
-#endif
-  std::ifstream fs(config_path_.c_str(), std::ifstream::in);
-  if (!fs.is_open()) {
-    MS_LOG(ERROR) << "config proto file %s open failed: " << config_path_;
-    delete[] resolved_path;
-    return RET_PARAM_INVALID;
-  }
-  std::string line;
-  while (std::getline(fs, line)) {
-    auto index = line.find('=');
-    if (index == std::string::npos) {
-      MS_LOG(ERROR) << "the config file is invalid, can not find '=', please check";
-      delete[] resolved_path;
-      return RET_PARAM_INVALID;
-    }
-    auto key = line.substr(0, index);
-    auto value = line.substr(index + 1);
-    Trim(&key);
-    Trim(&value);
-    if (key == "image_path") {
-      auto &raw_image_paths = value;
-      auto ind = raw_image_paths.find(',');
-      while (ind != std::string::npos) {
-        auto image_path = raw_image_paths.substr(0, ind);
-        Trim(&image_path);
-        config_param_.image_paths.push_back(image_path);
-        raw_image_paths = raw_image_paths.substr(ind + 1);
-        Trim(&raw_image_paths);
-        ind = raw_image_paths.find(',');
-      }
-      config_param_.image_paths.push_back(raw_image_paths);
-    } else if (key == "batch_count") {
-      config_param_.batch_count = std::stoul(value);
-    } else if (key == "thread_num") {
-      config_param_.thread_num = std::stoul(value);
-    } else if (key == "method_x") {
-      if (value != kMethodKL && value != kMethodMaxMin && value != kMethodOutlier) {
-        MS_LOG(WARNING) << "unsupported method_x: " << value << ". Use default value.";
-      } else {
-        config_param_.method_x = value;
-      }
-    } else if (key == "bias_correction") {
-      std::for_each(value.begin(), value.end(), ::tolower);
-      if (value == "true") {
-        config_param_.bias_correction = true;
-      }
-    } else {
-      MS_LOG(WARNING) << "unsupported parameter";
-    }
-  }
-
-  for (const auto &path : config_param_.image_paths) {
-    MS_LOG(DEBUG) << "calibration data_path: " << path;
-  }
-  MS_LOG(DEBUG) << "batch_count: " << config_param_.batch_count << "  "
-                << "method_x: " << config_param_.method_x << "  "
-                << "thread_num: " << config_param_.thread_num << " "
-                << "bias_correction: " << config_param_.bias_correction;
-
-  delete[] resolved_path;
-  fs.close();
-  return RET_OK;
-}
+STATUS Calibrator::ReadConfig() { return ParseConfigFile(config_path_, &config_param_); }
 
 Calibrator::Calibrator(string path, size_t bit_num, int quant_max, int quant_min)
     : config_path_(std::move(path)), bit_num_(bit_num), quant_max_(quant_max), quant_min_(quant_min) {}
@@ -621,8 +456,8 @@ STATUS PostTrainingQuantizer::DoQuantOutput(double scale, int zeropoint, struct
   return RET_OK;
 }
 
-STATUS PostTrainingQuantizer::DoWeightQuant(const AnfNodePtr &weight, std::shared_ptr<PrimitiveC> primitive_c,
-                                            bool perchanel) const {
+STATUS PostTrainingQuantizer::DoWeightQuant(const std::string &op_name, const AnfNodePtr &weight,
+                                            std::shared_ptr<PrimitiveC> primitive_c, bool perchanel) const {
   MS_ASSERT(weight != nullptr);
   MS_ASSERT(lite_primitive != nullptr);
   // perlayer
@@ -640,8 +475,21 @@ STATUS PostTrainingQuantizer::DoWeightQuant(const AnfNodePtr &weight, std::share
     MS_LOG(ERROR) << weight->fullname_with_scope() << " can not get value";
     return RET_NULL_PTR;
   }
-  auto status = QuantFilter<int8_t>(paramValue, std::move(primitive_c), QuantType_PostTraining, quant_max, quant_min,
-                                    bit_num, perchanel);
+  auto bit_num_t = bit_num;
+  auto quant_max_t = quant_max;
+  auto quant_min_t = quant_min;
+  if (calibrator_->config_param_.mixed) {
+    auto opname_iter = opname_bit_.find(op_name);
+    if (opname_iter == opname_bit_.end()) {
+      MS_LOG(WARNING) << op_name << " not in the opname_bit_ map";
+    } else {
+      bit_num_t = opname_iter->second;
+      quant_max_t = (1 << (unsigned int)(bit_num_t - 1)) - 1;
+      quant_min_t = -(1 << (unsigned int)(bit_num_t - 1));
+    }
+  }
+  auto status = QuantFilter<int8_t>(paramValue, std::move(primitive_c), QuantType_PostTraining, quant_max_t,
+                                    quant_min_t, bit_num_t, perchanel);
   if (status != RET_OK) {
     MS_LOG(ERROR) << "QuantFilter failed: " << status;
     return status;
@@ -921,7 +769,7 @@ STATUS PostTrainingQuantizer::QuantNode() {
           }
           if (abstractTensor->element()->GetTypeTrack()->type_id() == kNumberTypeFloat32) {
             MS_LOG(DEBUG) << "this parameter do quant";
-            DoWeightQuant(input_node, primitive_c, false);
+            DoWeightQuant(op_name, input_node, primitive_c, false);
           } else {
             MS_LOG(DEBUG) << "this parameter no need to do quant";
           }
@@ -943,7 +791,7 @@ STATUS PostTrainingQuantizer::QuantNode() {
           op_type == PrimitiveType_FullConnection) {
         perchannel = true;
       }
-      DoWeightQuant(weight, primitive_c, perchannel);
+      DoWeightQuant(op_name, weight, primitive_c, perchannel);
       // do bias quant
       if (cnode->inputs().size() == 4) {
         auto bias = cnode->input(3);
@@ -982,18 +830,8 @@ STATUS PostTrainingQuantizer::UpdateDivergInverval() {
  * 3. save quantied node
  **/
 STATUS PostTrainingQuantizer::PreProcess() {
-  if (this->calibrator_ == nullptr) {
-    MS_LOG(ERROR) << "calibrator is null!";
-    return RET_ERROR;
-  }
-  // 1. generate config param
-  STATUS status = calibrator_->ReadConfig();
-  if (status != RET_OK) {
-    MS_LOG(ERROR) << "read proto text failed!";
-    return status;
-  }
   // 2. collect image files
-  status = calibrator_->CollectImages();
+  auto status = calibrator_->CollectImages();
   if (status != RET_OK) {
     MS_LOG(ERROR) << "collect images failed!";
     return status;
@@ -1560,55 +1398,49 @@ STATUS PostTrainingQuantizer::ComputeThreshold() { return this->calibrator_->Com
 
 STATUS PostTrainingQuantizer::DoQuantize(FuncGraphPtr func_graph) {
   MS_LOG(INFO) << "start to parse config file";
-  STATUS status = PreProcess();
+  if (this->calibrator_ == nullptr) {
+    MS_LOG(ERROR) << "calibrator is null!";
+    return RET_ERROR;
+  }
+  // 1. generate config param
+  STATUS status = calibrator_->ReadConfig();
+  if (status != RET_OK) {
+    MS_LOG(ERROR) << "read proto text failed!";
+    return status;
+  }
+
+  if (calibrator_->config_param_.mixed) {
+    // get opname_bit map
+    auto weight_quant_func_graph = CopyFuncGraph(func_graph);
+    if (weight_quant_func_graph == nullptr) {
+      MS_LOG(ERROR) << "CopyFuncGraph error";
+      return RET_ERROR;
+    }
+    WeightQuantizer weight_quantizer(weight_quant_func_graph, calibrator_->config_param_);
+    weight_quantizer.flags = flags;
+    status = weight_quantizer.DoQuantize(weight_quant_func_graph);
+    if (status != RET_OK) {
+      MS_LOG(ERROR) << "Do mix weight quant error";
+      return RET_ERROR;
+    }
+    opname_bit_ = weight_quantizer.opname_bit_;
+  }
+
+  status = PreProcess();
   if (status != RET_OK) {
     MS_LOG(ERROR) << "do pre process failed!";
     return status;
   }
+
   // anf -- fb
-  auto meta_graph = Export(func_graph, true, true);
-  if (meta_graph == nullptr) {
-    MS_LOG(ERROR) << "Export to meta_graph return nullptr";
-    return RET_ERROR;
-  }
-
-  // transform
-  GraphDefTransform transform;
-  transform.SetGraphDef(meta_graph);
   flags.quantType = schema::QuantType_QUANT_NONE;
-  status = transform.Transform(flags);
-  if (status != RET_OK) {
-    MS_LOG(ERROR) << "FBTransform model failed " << status;
-    return RET_ERROR;
-  }
   MS_LOG(INFO) << "start create session";
-  flatbuffers::FlatBufferBuilder builder(1024);
-  auto offset = schema::MetaGraph::Pack(builder, meta_graph);
-  builder.Finish(offset);
-  schema::FinishMetaGraphBuffer(builder, offset);
-  size_t size = builder.GetSize();
-  auto *content = reinterpret_cast<const char *>(builder.GetBufferPointer());
-  if (content == nullptr) {
-    MS_LOG(ERROR) << "GetBufferPointer nullptr";
-    return RET_ERROR;
-  }
-  auto model = lite::Model::Import(content, size);
-
-  Context ctx;
-  ctx.thread_num_ = calibrator_->GetThreadNum();
-
-  fp32_session_ = dynamic_cast<mindspore::lite::LiteSession *>(session::LiteSession::CreateSession(&ctx));
+  fp32_session_ = CreateSessionByFuncGraph(func_graph, flags, calibrator_->GetThreadNum());
   if (fp32_session_ == nullptr) {
     MS_LOG(ERROR) << "create session failed!";
     return RET_ERROR;
   }
 
-  auto ret = fp32_session_->CompileGraph(model);
-  if (ret != lite::RET_OK) {
-    MS_LOG(ERROR) << "compile graph error";
-    return RET_ERROR;
-  }
-
   MS_LOG(INFO) << "start to update divergence's max value";
   status = DoInference();
   if (status != RET_OK) {
@@ -1647,49 +1479,13 @@ STATUS PostTrainingQuantizer::DoQuantize(FuncGraphPtr func_graph) {
 
   if (calibrator_->GetBiasCorrection()) {
     // init in8 session
-    // anf -- fb
-    auto int8_meta_graph = Export(func_graph, true, true);
-    if (int8_meta_graph == nullptr) {
-      MS_LOG(ERROR) << "Export to int8_meta_graph return nullptr";
-      return RET_ERROR;
-    }
-
-    // transform
-    GraphDefTransform fb_transform;
-    fb_transform.SetGraphDef(int8_meta_graph);
+    MS_LOG(INFO) << "create quant session";
     flags.quantType = schema::QuantType_PostTraining;
-    status = fb_transform.Transform(flags);
-    if (status != RET_OK) {
-      MS_LOG(ERROR) << "FBTransform model failed " << status;
-      return RET_ERROR;
-    }
-    MS_LOG(INFO) << "start create quantized session";
-    flatbuffers::FlatBufferBuilder int8_builder(1024);
-    auto int8_offset = schema::MetaGraph::Pack(int8_builder, int8_meta_graph);
-    int8_builder.Finish(int8_offset);
-    schema::FinishMetaGraphBuffer(int8_builder, int8_offset);
-    size = int8_builder.GetSize();
-    auto *int8_content = reinterpret_cast<const char *>(int8_builder.GetBufferPointer());
-    if (int8_content == nullptr) {
-      MS_LOG(ERROR) << "GetBufferPointer nullptr";
-      return RET_ERROR;
-    }
-    auto int8_model = lite::Model::Import(int8_content, size);
-
-    Context int8_ctx;
-    int8_ctx.thread_num_ = calibrator_->GetThreadNum();
-    int8_ctx.device_list_[0].device_info_.cpu_device_info_.cpu_bind_mode_ = HIGHER_CPU;
-
-    int8_session_ = dynamic_cast<mindspore::lite::LiteSession *>(session::LiteSession::CreateSession(&int8_ctx));
+    int8_session_ = CreateSessionByFuncGraph(func_graph, flags, calibrator_->GetThreadNum());
     if (int8_session_ == nullptr) {
       MS_LOG(ERROR) << "create session failed!";
       return RET_ERROR;
     }
-    ret = int8_session_->CompileGraph(int8_model);
-    if (ret != lite::RET_OK) {
-      MS_LOG(ERROR) << "compile graph error";
-      return RET_ERROR;
-    }
 
     MS_LOG(INFO) << "do bias correction";
     status = BiasCorrection(func_graph);
diff --git a/mindspore/lite/tools/converter/quantizer/post_training_quantizer.h b/mindspore/lite/tools/converter/quantizer/post_training_quantizer.h
index 0665eecc070..3a9b70ee31c 100644
--- a/mindspore/lite/tools/converter/quantizer/post_training_quantizer.h
+++ b/mindspore/lite/tools/converter/quantizer/post_training_quantizer.h
@@ -28,6 +28,8 @@
 #include "tools/converter/quantizer/quantizer.h"
 #include "tools/converter/converter.h"
 #include "include/ms_tensor.h"
+#include "tools/converter/quantizer/quantize_util.h"
+#include "tools/converter/quantizer/weight_quantizer.h"
 
 namespace mindspore::lite::quant {
 class Calibrator;
@@ -38,19 +40,8 @@ struct MaxMin {
   float max;
 };
 
-const char kMethodMaxMin[] = "MAX_MIN";
-const char kMethodKL[] = "KL";
-const char kMethodOutlier[] = "RemovalOutlier";
 constexpr int kDefaultBinNumber = 2048;
 
-struct ConfigParam {
-  std::vector<std::string> image_paths;
-  uint32_t batch_count{100};
-  std::string method_x{kMethodKL};
-  uint32_t thread_num{1};
-  bool bias_correction{false};
-};
-
 class PostTrainingQuantizer : public Quantizer {
  public:
   PostTrainingQuantizer(FuncGraphPtr graph, std::string path, int bit_num, TypeId target_type = kNumberTypeInt8,
@@ -64,14 +55,16 @@ class PostTrainingQuantizer : public Quantizer {
   int quant_min{INT8_MIN};
 
  private:
+  std::map<std::string, int> opname_bit_;
+
   bool per_channel_{true};
 
   TypeId target_type_{kNumberTypeInt8};
 
   std::unique_ptr<Calibrator> calibrator_;
 
-  mindspore::lite::LiteSession *fp32_session_;
-  mindspore::lite::LiteSession *int8_session_;
+  session::LiteSession *fp32_session_{nullptr};
+  session::LiteSession *int8_session_{nullptr};
 
   std::map<std::string, std::vector<float>> fp32_op_input_map;           // concurency
   std::map<std::string, std::vector<float>> fp32_op_output_ch_mean_map;  // concurency
@@ -112,7 +105,8 @@ class PostTrainingQuantizer : public Quantizer {
   STATUS DoQuantOutput(double scale, int32_t zeropoint, struct MaxMin *max_min,
                        const std::shared_ptr<PrimitiveC> &) const;
 
-  STATUS DoWeightQuant(const AnfNodePtr &weight, std::shared_ptr<PrimitiveC> primitive_c, bool perchannel) const;
+  STATUS DoWeightQuant(const std::string &op_name, const AnfNodePtr &weight, std::shared_ptr<PrimitiveC> primitive_c,
+                       bool perchannel) const;
 
   STATUS DoBiasQuant(const AnfNodePtr &bias, const std::shared_ptr<PrimitiveC> &primitive_c);
   STATUS Int8Inference();
@@ -213,13 +207,13 @@ class Calibrator {
 
   std::unordered_map<std::string, std::vector<std::unique_ptr<DivergInfo>>> *GetOutputDivergInfo();
 
+  PostQuantConfig config_param_;
+
  private:
   std::vector<std::vector<std::string>> images_;  // multi_input, echo input has multi input data
 
   std::string config_path_;
 
-  ConfigParam config_param_;
-
   std::unordered_map<std::string, std::vector<std::unique_ptr<DivergInfo>>> inputs_diverg_info_;
 
   std::unordered_map<std::string, std::vector<std::unique_ptr<DivergInfo>>> outputs_diverg_info_;
@@ -227,8 +221,6 @@ class Calibrator {
   size_t bit_num_;
   int quant_max_;
   int quant_min_;
-
-  void AddImage(const std::string &file, size_t index);
 };
 }  // namespace mindspore::lite::quant
 #endif  // MINDSPORE_LITE_TOOLS_CONVERTER_QUANTIZER_POSTRAINING_QUANTIZER_H
diff --git a/mindspore/lite/tools/converter/quantizer/quantize_util.cc b/mindspore/lite/tools/converter/quantizer/quantize_util.cc
index 5de9b7d43db..1ec399c060c 100644
--- a/mindspore/lite/tools/converter/quantizer/quantize_util.cc
+++ b/mindspore/lite/tools/converter/quantizer/quantize_util.cc
@@ -17,6 +17,8 @@
 #include "mindspore/lite/tools/converter/quantizer/quantize_util.h"
 #include <cmath>
 #include <string>
+#include <map>
+#include <fstream>
 #include <algorithm>
 #include <memory>
 #include <vector>
@@ -26,6 +28,8 @@
 #include "src/common/utils.h"
 #include "abstract/abstract_value.h"
 #include "securec/include/securec.h"
+#include "tools/anf_exporter/anf_exporter.h"
+#include "mindspore/lite/include/version.h"
 
 using std::string;
 using std::vector;
@@ -83,10 +87,10 @@ bool QuantStrategy::CanConvOpQuantized(const CNodePtr &node) const {
 
 bool QuantStrategy::CanOpPostQuantized(AnfNodePtr &node) const {
   MS_ASSERT(node != nullptr);
-  if (!node->isa<CNode>()) {
+  if (!node->isa<mindspore::CNode>()) {
     return false;
   }
-  auto cnode = std::dynamic_pointer_cast<CNode>(node);
+  auto cnode = std::dynamic_pointer_cast<mindspore::CNode>(node);
   auto type = NodePrimitiveType(cnode);
   static const std::vector<schema::PrimitiveType> int8OpList = {
     schema::PrimitiveType_Conv2D,
@@ -475,4 +479,307 @@ schema::PrimitiveType NodePrimitiveType(const CNodePtr &cnode) {
   }
   return (schema::PrimitiveType)primitive_c->Type();
 }
+
+STATUS ParseConfigFile(std::string config_file, PostQuantConfig *post_quant_config) {
+  if (post_quant_config == nullptr) {
+    MS_LOG(ERROR) << "post_quant_config is null.";
+    return RET_PARAM_INVALID;
+  }
+
+  if (config_file.empty() || config_file.length() > PATH_MAX) {
+    MS_LOG(ERROR) << "invalid config path!";
+    return RET_PARAM_INVALID;
+  }
+  // check whether config file path is valid
+  auto resolved_path = std::make_unique<char[]>(PATH_MAX);
+  if (resolved_path == nullptr) {
+    MS_LOG(ERROR) << "New an object failed.";
+    return RET_ERROR;
+  }
+#ifdef _WIN32
+  if (_fullpath(resolved_path.get(), config_file.c_str(), 1024) != nullptr) {
+    config_file = string(resolved_path.get());
+  }
+#else
+  if (realpath(config_file.c_str(), resolved_path.get()) != nullptr) {
+    config_file = string(resolved_path.get());
+  }
+#endif
+  std::ifstream fs(config_file.c_str(), std::ifstream::in);
+  if (!fs.is_open()) {
+    MS_LOG(ERROR) << "config file open failed: " << config_file;
+    return RET_PARAM_INVALID;
+  }
+  std::string line;
+  while (std::getline(fs, line)) {
+    Trim(&line);
+    if (line.empty()) {
+      continue;
+    }
+    auto index = line.find('=');
+    if (index == std::string::npos) {
+      MS_LOG(ERROR) << "the config file is invalid, can not find '=', please check";
+      return RET_PARAM_INVALID;
+    }
+    auto key = line.substr(0, index);
+    auto value = line.substr(index + 1);
+    Trim(&key);
+    Trim(&value);
+    if (key == "image_path") {
+      auto &raw_image_paths = value;
+      auto ind = raw_image_paths.find(',');
+      while (ind != std::string::npos) {
+        auto image_path = raw_image_paths.substr(0, ind);
+        Trim(&image_path);
+        post_quant_config->image_paths.push_back(image_path);
+        raw_image_paths = raw_image_paths.substr(ind + 1);
+        Trim(&raw_image_paths);
+        ind = raw_image_paths.find(',');
+      }
+      post_quant_config->image_paths.push_back(raw_image_paths);
+    } else if (key == "batch_count") {
+      post_quant_config->batch_count = std::stoul(value);
+    } else if (key == "thread_num") {
+      post_quant_config->thread_num = std::stoul(value);
+    } else if (key == "method_x") {
+      if (value != kMethodKL && value != kMethodMaxMin && value != kMethodOutlier) {
+        MS_LOG(WARNING) << "unsupported method_x: " << value << ". Use default value.";
+      } else {
+        post_quant_config->method_x = value;
+      }
+    } else if (key == "bias_correction") {
+      std::for_each(value.begin(), value.end(), ::tolower);
+      if (value == "true") {
+        post_quant_config->bias_correction = true;
+      }
+    } else if (key == "mixed") {
+      std::for_each(value.begin(), value.end(), ::tolower);
+      if (value == "true") {
+        post_quant_config->mixed = true;
+      }
+    } else if (key == "mean_error_threshold") {
+      post_quant_config->mean_error_threshold = std::stof(value);
+    } else {
+      MS_LOG(WARNING) << "unsupported parameter: " << key;
+    }
+  }
+
+  for (const auto &path : post_quant_config->image_paths) {
+    MS_LOG(DEBUG) << "calibration data_path: " << path;
+  }
+  MS_LOG(DEBUG) << "batch_count: " << post_quant_config->batch_count << "\n"
+                << "method_x: " << post_quant_config->method_x << "\n"
+                << "thread_num: " << post_quant_config->thread_num << "\n"
+                << "bias_correction: " << post_quant_config->bias_correction << "\n"
+                << "mixed: " << post_quant_config->mixed << "\n"
+                << "mean_error_threshold: " << post_quant_config->mean_error_threshold;
+  post_quant_config->inited = true;
+  fs.close();
+  return RET_OK;
+}
+
+session::LiteSession *CreateSessionByFuncGraph(const FuncGraphPtr &func_graph, const converter::Flags &flags,
+                                               int thread_num) {
+  auto meta_graph = Export(func_graph, true, true);
+  if (meta_graph == nullptr) {
+    MS_LOG(ERROR) << "Export to meta_graph failed";
+    return nullptr;
+  }
+
+  // transform
+  GraphDefTransform fb_transform;
+  fb_transform.SetGraphDef(meta_graph);
+  auto status = fb_transform.Transform(flags);
+  if (status != RET_OK) {
+    MS_LOG(ERROR) << "FBTransform model failed";
+    return nullptr;
+  }
+  meta_graph->version = Version();
+
+  flatbuffers::FlatBufferBuilder builder(1024);
+  auto offset = schema::MetaGraph::Pack(builder, meta_graph);
+  builder.Finish(offset);
+  schema::FinishMetaGraphBuffer(builder, offset);
+  auto size = builder.GetSize();
+  auto *content = reinterpret_cast<const char *>(builder.GetBufferPointer());
+  if (content == nullptr) {
+    MS_LOG(ERROR) << "GetBufferPointer return null";
+    return nullptr;
+  }
+  auto model = lite::Model::Import(content, size);
+  if (model == nullptr) {
+    MS_LOG(ERROR) << "Import model failed";
+    return nullptr;
+  }
+
+  Context ctx;
+  ctx.thread_num_ = thread_num;
+
+  auto session = session::LiteSession::CreateSession(&ctx);
+  if (session == nullptr) {
+    MS_LOG(ERROR) << "create session failed.";
+    return nullptr;
+  }
+
+  status = session->CompileGraph(model);
+  if (status != RET_OK) {
+    MS_LOG(ERROR) << "CompileGraph error";
+    return nullptr;
+  }
+  model->Free();
+  return session;
+}
+
+STATUS CollectCalibInputs(const std::vector<std::string> &input_dirs, size_t count_limited,
+                          std::vector<std::vector<std::string>> *inputs) {
+  if (inputs == nullptr) {
+    MS_LOG(ERROR) << "inputs is null";
+    return RET_ERROR;
+  }
+  auto AddImage = [&inputs](const std::string &file, size_t index) {
+    if (index >= inputs->size()) {
+      MS_LOG(ERROR) << "images_ size: " << inputs->size() << " but input index: " << index;
+      return;
+    }
+    struct stat buf {};
+    if (stat(file.c_str(), &buf) == 0) {
+      inputs->at(index).push_back(file);
+    } else {
+      MS_LOG(WARNING) << "invalid image file path: " << file;
+    }
+  };
+
+  inputs->resize(input_dirs.size());
+  auto input_i = 0;
+  bool multi_input = input_dirs.size() > 1;
+  for (const auto &image_path : input_dirs) {
+    DIR *root = opendir(image_path.c_str());
+    if (root == nullptr) {
+      MS_LOG(ERROR) << "invalid image path: " << image_path;
+      return RET_PARAM_INVALID;
+    }
+    struct dirent *image_dir = readdir(root);
+    size_t count = 0;
+    while (image_dir != nullptr) {
+      string file_name(image_dir->d_name);
+      if (file_name != "." && file_name != "..") {
+        const std::string file_path = image_path + "/" + file_name;
+        if (multi_input || count == 0) {
+          AddImage(file_path, input_i);
+          count++;
+        } else if (count < count_limited) {
+          AddImage(file_path, input_i);
+          count++;
+        } else {
+          break;
+        }
+      }
+      image_dir = readdir(root);
+    }
+    std::sort(inputs->at(input_i).begin(), inputs->at(input_i).end());
+    if (count_limited != 0 && count_limited < inputs->at(input_i).size()) {
+      inputs->at(input_i).resize(count_limited);
+    }
+    closedir(root);
+    input_i++;
+  }
+  return RET_OK;
+}
+
+STATUS CopyInputDataToTensor(size_t input_index, size_t image_index,
+                             const std::vector<std::vector<std::string>> &images, mindspore::tensor::MSTensor *tensor) {
+  MS_ASSERT(tensor != nullptr);
+  if (input_index >= images.size()) {
+    MS_LOG(ERROR) << "images_ size: " << images.size() << " but input_index: " << input_index;
+    return RET_ERROR;
+  }
+  if (image_index >= images[input_index].size()) {
+    MS_LOG(ERROR) << "images_[input_index] size: " << images[input_index].size() << " but image_index: " << image_index;
+    return RET_ERROR;
+  }
+  string path = images[input_index][image_index];
+  MS_LOG(INFO) << "read image: " << path;
+  size_t size;
+  char *bin_buf = ReadFile(path.c_str(), &size);
+  if (bin_buf == nullptr) {
+    MS_LOG(ERROR) << "ReadFile return nullptr";
+    return RET_NULL_PTR;
+  }
+  auto data = tensor->MutableData();
+  if (data == nullptr) {
+    MS_LOG(ERROR) << "Get tensor MutableData return nullptr";
+    return RET_NULL_PTR;
+  }
+  if (size != tensor->Size()) {
+    MS_LOG(ERROR) << "the input data is not consistent with model input, file_size: " << size
+                  << " input tensor size: " << tensor->Size();
+    return RET_ERROR;
+  }
+  auto ret = memcpy_s(data, tensor->Size(), bin_buf, size);
+  if (ret != EOK) {
+    MS_LOG(ERROR) << "memcpy_s error: " << ret;
+    delete[] bin_buf;
+    return RET_ERROR;
+  }
+  delete[] bin_buf;
+  return RET_OK;
+}
+
+FuncGraphPtr CopyFuncGraph(const FuncGraphPtr &func_graph) {
+  Cloner cloner({func_graph}, true, true, true, std::make_shared<TraceCopy>(), nullptr);
+  auto new_func_graph = cloner[func_graph];
+
+  std::map<std::string, CNodePtr> old_cnode_map;
+  for (const auto &cnode : func_graph->GetOrderedCnodes()) {
+    old_cnode_map[cnode->fullname_with_scope()] = cnode;
+  }
+
+  for (auto &cnode : new_func_graph->GetOrderedCnodes()) {
+    auto cnode_name = cnode->fullname_with_scope();
+    auto old_cnode_iter = old_cnode_map.find(cnode_name);
+    if (old_cnode_iter == old_cnode_map.end()) {
+      MS_LOG(ERROR) << "can not find node: " << cnode_name;
+      return nullptr;
+    }
+    auto old_cnode = old_cnode_iter->second;
+    auto inputs = cnode->inputs();
+    for (size_t i = 0; i < inputs.size(); i++) {
+      auto input_node = inputs[i];
+      if (input_node->isa<Parameter>()) {
+        auto param_node = input_node->cast<ParameterPtr>();
+        if (param_node->has_default()) {
+          ParamValueLitePtr old_param_value = std::static_pointer_cast<ParamValueLite>(param_node->default_param());
+          auto new_param_value = std::make_shared<ParamValueLite>();
+
+          auto copyed_data = malloc(old_param_value->tensor_size());
+          if (copyed_data == nullptr) {
+            MS_LOG(ERROR) << "malloc data error, size: " << old_param_value->tensor_size();
+            return nullptr;
+          }
+          memcpy(copyed_data, old_param_value->tensor_addr(), old_param_value->tensor_size());
+
+          new_param_value->set_tensor_size(old_param_value->tensor_size());
+          new_param_value->set_tensor_addr(copyed_data);
+          new_param_value->set_tensor_shape(old_param_value->tensor_shape());
+          new_param_value->set_format(old_param_value->format());
+          new_param_value->set_tensor_type(old_param_value->tensor_type());
+
+          param_node->set_default_param(new_param_value);
+        }
+
+        auto old_abstract_base = param_node->abstract();
+        if (!utils::isa<abstract::AbstractTensorPtr>(old_abstract_base)) {
+          MS_LOG(ERROR) << "Abstract of parameter should be abstract tensor, " << param_node->name();
+          return nullptr;
+        }
+        auto old_abstract = utils::cast<abstract::AbstractTensorPtr>(old_abstract_base);
+        auto new_abstract = std::make_shared<abstract::AbstractTensor>(old_abstract->element()->GetTypeTrack(),
+                                                                       old_abstract->GetShapeTrack());
+        param_node->set_abstract(new_abstract);
+      }
+    }  // end inputs loop
+  }    // end cnodes loop
+  return new_func_graph;
+}
+
 }  // namespace mindspore::lite::quant
diff --git a/mindspore/lite/tools/converter/quantizer/quantize_util.h b/mindspore/lite/tools/converter/quantizer/quantize_util.h
index b8eaf9e00ab..7fae9738efd 100644
--- a/mindspore/lite/tools/converter/quantizer/quantize_util.h
+++ b/mindspore/lite/tools/converter/quantizer/quantize_util.h
@@ -17,6 +17,8 @@
 #ifndef MINDSPORE_LITE_TOOLS_CONVERTER_QUANTIZER_QUANTIZER_UTIL_H
 #define MINDSPORE_LITE_TOOLS_CONVERTER_QUANTIZER_QUANTIZER_UTIL_H
 
+#include <dirent.h>
+#include <sys/stat.h>
 #include <memory>
 #include <string>
 #include <cmath>
@@ -35,11 +37,29 @@
 #include "ir/primitive.h"
 #include "abstract/dshape.h"
 #include "tools/converter/quantizer/bitpacking.h"
+#include "src/lite_session.h"
+#include "tools/converter/graphdef_transform.h"
+#include "src/common/file_utils.h"
 
 namespace mindspore::lite::quant {
 static constexpr size_t UINT8_QUANTIZATION = 8;
 static constexpr size_t WEIGHT_INDEX = 1;
 
+const char kMethodMaxMin[] = "MAX_MIN";
+const char kMethodKL[] = "KL";
+const char kMethodOutlier[] = "RemovalOutlier";
+
+struct PostQuantConfig {
+  std::vector<std::string> image_paths;
+  uint32_t batch_count{100};
+  std::string method_x{kMethodKL};
+  uint32_t thread_num{1};
+  bool bias_correction{false};
+  bool mixed{false};
+  float mean_error_threshold{0.04};
+  bool inited{false};
+};
+
 /**
  * 1. when op's weight size > mWeightSize just skip
  * 2. only do conv/deconv/convdepthwise/deconvdepthwise/mul/matmul/batchmatmul quantization
@@ -320,6 +340,21 @@ STATUS QuantFilter(const ParamValueLitePtr &weight, const std::shared_ptr<Primit
   return RET_OK;
 }
 
+// utils
+
 schema::PrimitiveType NodePrimitiveType(const CNodePtr &cnode);
+
+STATUS ParseConfigFile(std::string config_file, PostQuantConfig *post_quant_config);
+
+session::LiteSession *CreateSessionByFuncGraph(const FuncGraphPtr &func_graph, const converter::Flags &flags,
+                                               int thread_num);
+
+STATUS CollectCalibInputs(const std::vector<std::string> &input_dirs, size_t count_limited,
+                          std::vector<std::vector<std::string>> *inputs);
+
+STATUS CopyInputDataToTensor(size_t input_index, size_t image_index,
+                             const std::vector<std::vector<std::string>> &images, mindspore::tensor::MSTensor *tensor);
+
+FuncGraphPtr CopyFuncGraph(const FuncGraphPtr &);
 }  // namespace mindspore::lite::quant
 #endif
diff --git a/mindspore/lite/tools/converter/quantizer/weight_quantizer.cc b/mindspore/lite/tools/converter/quantizer/weight_quantizer.cc
index 8eda191dec6..04038d6ce73 100644
--- a/mindspore/lite/tools/converter/quantizer/weight_quantizer.cc
+++ b/mindspore/lite/tools/converter/quantizer/weight_quantizer.cc
@@ -18,6 +18,7 @@
 #include <list>
 #include <string>
 #include <vector>
+#include <unordered_map>
 #include "src/common/common.h"
 #include "ir/dtype/type_id.h"
 
@@ -36,6 +37,7 @@ bool WeightQuantizer::IsPosNum(const std::string &str) {
   }
   return true;
 }
+
 STATUS WeightQuantizer::WeightQuantInputCheck(const converter::Flags *config) {
   MS_ASSERT(config != nullptr);
   if (!WeightQuantizer::IsPosNum(config->quantWeightChannel)) {
@@ -57,28 +59,57 @@ STATUS WeightQuantizer::WeightQuantInputCheck(const converter::Flags *config) {
   }
   return RET_OK;
 }
-WeightQuantizer::WeightQuantizer(FuncGraphPtr graph, const string &weightSize,
+
+WeightQuantizer::WeightQuantizer(FuncGraphPtr graph, const PostQuantConfig &config) : Quantizer(graph) {
+  quant_strategy_ = std::make_unique<QuantStrategy>(0, 0);
+  config_param_ = config;
+}
+
+WeightQuantizer::WeightQuantizer(FuncGraphPtr graph, const std::string &config_file, const string &weightSize,
                                  const std::string &convWeightChannelThreshold, const std::string &bitNum)
     : Quantizer(graph) {
+  this->config_file_ = config_file;
   auto quantSize = static_cast<size_t>(std::stoull(weightSize));
-  this->bitNum = static_cast<size_t>(std::stoull(bitNum));
+  this->bit_num_ = static_cast<size_t>(std::stoull(bitNum));
   auto convQuantWeightChannelThreshold = static_cast<size_t>(std::stoull(convWeightChannelThreshold));
-  mStrategy = std::make_unique<QuantStrategy>(quantSize, convQuantWeightChannelThreshold);
-  quant_max = (1 << (unsigned int)(this->bitNum - 1)) - 1;
-  quant_min = -(1 << (unsigned int)(this->bitNum - 1));
+  quant_strategy_ = std::make_unique<QuantStrategy>(quantSize, convQuantWeightChannelThreshold);
+  quant_max = (1 << (unsigned int)(this->bit_num_ - 1)) - 1;
+  quant_min = -(1 << (unsigned int)(this->bit_num_ - 1));
   // parse type_id
-  if (this->bitNum > 0 && this->bitNum <= 8) {
+  if (this->bit_num_ > 0 && this->bit_num_ <= 8) {
     type_id = kNumberTypeInt8;
-  } else if (this->bitNum <= 16) {
+  } else if (this->bit_num_ <= 16) {
     type_id = kNumberTypeInt16;
   } else {
     MS_LOG(ERROR) << "invalid input bits";
   }
 }
 
+WeightQuantizer::~WeightQuantizer() { delete fp32_session_; }
+
+STATUS WeightQuantizer::SetAbstract(ParamValueLitePtr param_value, ParameterPtr param_node,
+                                    std::shared_ptr<PrimitiveC> primitive_c) {
+  // set dtype
+  param_value->set_tensor_type(type_id);
+  auto abstract_base = param_node->abstract();
+  if (abstract_base == nullptr) {
+    MS_LOG(ERROR) << "Abstract of parameter is nullptr, " << param_node->name();
+    return RET_ERROR;
+  }
+  if (!utils::isa<abstract::AbstractTensorPtr>(abstract_base)) {
+    MS_LOG(ERROR) << "Abstract of parameter should be anstract tensor, " << param_node->name();
+    return RET_ERROR;
+  }
+  auto abstract_tensor = utils::cast<abstract::AbstractTensorPtr>(abstract_base);
+  abstract_tensor->element()->set_type(TypeIdToType(type_id));
+  primitive_c->set_quant_type(schema::QuantType_WeightQuant);
+
+  return RET_OK;
+}
+
 STATUS WeightQuantizer::DoConvQuantize(const std::list<CNodePtr> &nodes) {
   for (auto &cnode : nodes) {
-    if (!mStrategy->CanConvOpQuantized(cnode)) {
+    if (!quant_strategy_->CanConvOpQuantized(cnode)) {
       continue;
     }
 
@@ -108,36 +139,28 @@ STATUS WeightQuantizer::DoConvQuantize(const std::list<CNodePtr> &nodes) {
     }
     auto status = RET_ERROR;
     if (type_id == kNumberTypeInt8) {
-      status = QuantFilter<int8_t>(param_value, primitive_c, QuantType_WeightQuant, quant_max, quant_min, bitNum, true);
+      status =
+        QuantFilter<int8_t>(param_value, primitive_c, QuantType_WeightQuant, quant_max, quant_min, bit_num_, true);
     } else if (type_id == kNumberTypeInt16) {
       status =
-        QuantFilter<int16_t>(param_value, primitive_c, QuantType_WeightQuant, quant_max, quant_min, bitNum, true);
+        QuantFilter<int16_t>(param_value, primitive_c, QuantType_WeightQuant, quant_max, quant_min, bit_num_, true);
     }
     if (status != RET_OK) {
       MS_LOG(ERROR) << "QuantFilter failed : " << status;
       return status;
     }
-    // set dtype
-    param_value->set_tensor_type(type_id);
-    auto abstractBase = param_node->abstract();
-    if (abstractBase == nullptr) {
-      MS_LOG(ERROR) << "Abstract of parameter is nullptr, " << param_node->name();
+    status = SetAbstract(param_value, param_node, primitive_c);
+    if (status != RET_OK) {
+      MS_LOG(ERROR) << "SetAbstract failed : " << status;
       return RET_ERROR;
     }
-    if (!utils::isa<abstract::AbstractTensorPtr>(abstractBase)) {
-      MS_LOG(ERROR) << "Abstract of parameter should be anstract tensor, " << param_node->name();
-      return RET_ERROR;
-    }
-    auto abstractTensor = utils::cast<abstract::AbstractTensorPtr>(abstractBase);
-    abstractTensor->element()->set_type(TypeIdToType(type_id));
-    primitive_c->set_quant_type(schema::QuantType_WeightQuant);
   }
   return RET_OK;
 }
 
 STATUS WeightQuantizer::DoMulQuantize(const std::list<CNodePtr> &nodes) {
   for (auto &node : nodes) {
-    if (!mStrategy->CanMulOpQuantized(node)) {
+    if (!quant_strategy_->CanMulOpQuantized(node)) {
       continue;
     }
     auto already_quant = false;
@@ -186,38 +209,271 @@ STATUS WeightQuantizer::DoMulQuantize(const std::list<CNodePtr> &nodes) {
 
     auto status = RET_ERROR;
     if (type_id == kNumberTypeInt8) {
-      status = QuantFilter<int8_t>(param_value, primitive_c, QuantType_WeightQuant, quant_max, quant_min, bitNum, true);
+      status =
+        QuantFilter<int8_t>(param_value, primitive_c, QuantType_WeightQuant, quant_max, quant_min, bit_num_, true);
     } else if (type_id == kNumberTypeInt16) {
       status =
-        QuantFilter<int16_t>(param_value, primitive_c, QuantType_WeightQuant, quant_max, quant_min, bitNum, true);
+        QuantFilter<int16_t>(param_value, primitive_c, QuantType_WeightQuant, quant_max, quant_min, bit_num_, true);
     }
     if (status != RET_OK) {
       MS_LOG(ERROR) << "QuantFilter failed : " << status;
       return status;
     }
-    param_value->set_tensor_type(type_id);
-    // set dtype
-    auto abstractBase = param_node->abstract();
-    if (abstractBase == nullptr) {
-      MS_LOG(ERROR) << "Abstract of parameter is nullptr, " << param_node->name();
+    status = SetAbstract(param_value, param_node, primitive_c);
+    if (status != RET_OK) {
+      MS_LOG(ERROR) << "SetAbstract failed : " << status;
       return RET_ERROR;
     }
-    if (!utils::isa<abstract::AbstractTensorPtr>(abstractBase)) {
-      MS_LOG(ERROR) << "Abstract of parameter should be anstract tensor, " << param_node->name();
-      return RET_ERROR;
-    }
-    auto abstractTensor = utils::cast<abstract::AbstractTensorPtr>(abstractBase);
-    abstractTensor->element()->set_type(TypeIdToType(type_id));
-    primitive_c->set_quant_type(schema::QuantType_WeightQuant);
   }
 
   return RET_OK;
 }
 
-STATUS WeightQuantizer::DoQuantize(FuncGraphPtr funcGraph) {
-  MS_ASSERT(funcGraph != nullptr);
+constexpr float relative_tolerance = 1e-5;
+constexpr float abs_tolerance = 1e-4;
+
+template <typename T>
+float CompareOutputData(const std::unordered_map<std::string, mindspore::tensor::MSTensor *> &expected_tensor,
+                        const std::unordered_map<std::string, mindspore::tensor::MSTensor *> &compare_tensor) {
+  auto valid_data = [](T data) -> bool { return (!std::isnan(data) && !std::isinf(data)); };
+
+  float total_mean_error = 0.0f;
+  int tensor_cnt = expected_tensor.size();
+
+  if (tensor_cnt <= 0) {
+    MS_LOG(ERROR) << "unexpected tensor_cnt: " << tensor_cnt;
+    return RET_ERROR;
+  }
+
+  for (const auto &exp_tensor_pair : expected_tensor) {
+    float mean_error = 0.0f;
+    int error_cnt = 0;
+
+    auto exp_tensor_name = exp_tensor_pair.first;
+    auto exp_tensor = exp_tensor_pair.second;
+    auto cmp_tensor_find_iter = compare_tensor.find(exp_tensor_name);
+    if (cmp_tensor_find_iter == compare_tensor.end()) {
+      MS_LOG(ERROR) << "can not find: " << exp_tensor_name;
+      return RET_ERROR;
+    }
+    auto cmp_tensor = cmp_tensor_find_iter->second;
+
+    auto exp_tensor_shape = exp_tensor->shape();
+    auto cmp_tensor_shape = cmp_tensor->shape();
+    if (exp_tensor_shape != cmp_tensor_shape) {
+      MS_LOG(ERROR) << "exp tensor shape not equal to cmp. exp_tensor_elem_cnt: " << exp_tensor->ElementsNum()
+                    << " cmp_tensor_elem_cnt: " << cmp_tensor->ElementsNum();
+      return RET_ERROR;
+    }
+    auto exp_data = static_cast<T *>(exp_tensor->MutableData());
+    auto cmp_data = static_cast<T *>(cmp_tensor->MutableData());
+    auto elem_cnt = exp_tensor->ElementsNum();
+    for (int i = 0; i < elem_cnt; i++) {
+      if (!valid_data(exp_data[i]) || !valid_data(cmp_data[i])) {
+        MS_LOG(ERROR) << "data is not valid. exp: " << exp_data[i] << " cmp: " << cmp_data[i] << " index: " << i;
+        return RET_ERROR;
+      }
+      auto tolerance = abs_tolerance + relative_tolerance * fabs(exp_data[i]);
+      auto abs_error = std::fabs(exp_data[i] - cmp_data[i]);
+      if (abs_error > tolerance) {
+        if (fabs(exp_data[i] == 0)) {
+          if (abs_error > 1e-5) {
+            mean_error += abs_error;
+            error_cnt++;
+          } else {
+            // it is ok, very close to 0
+            continue;
+          }
+        } else {
+          mean_error += abs_error / (fabs(exp_data[i]) + FLT_MIN);
+          error_cnt++;
+        }
+      } else {
+        // it is ok, no error
+        continue;
+      }
+    }  // end one tensor data loop
+    total_mean_error += mean_error / elem_cnt;
+  }  // end tensor loop
+  return total_mean_error / tensor_cnt;
+}
+
+STATUS WeightQuantizer::DoMiexedQuant(FuncGraphPtr func_graph) {
+  // 0.1 Create Fp32 Session
+  flags.quantType = schema::QuantType_QUANT_NONE;
+  fp32_session_ = CreateSessionByFuncGraph(func_graph, flags, config_param_.thread_num);
+  if (fp32_session_ == nullptr) {
+    MS_LOG(ERROR) << "CreateSessoin fail";
+    return RET_ERROR;
+  }
+  auto fp32_inputs = fp32_session_->GetInputs();
+  // 0.2 Parse input calib files
+  auto status = CollectCalibInputs(config_param_.image_paths, config_param_.batch_count, &images_);
+  if (status != RET_OK) {
+    MS_LOG(ERROR) << "CollectCalibInputs fail";
+    return RET_ERROR;
+  }
+
+  auto cnodes = func_graph->GetOrderedCnodes();
+  for (auto iter = cnodes.end(); iter != cnodes.begin();) {
+    auto cnode = *(--iter);
+    auto primitive_c = GetValueNode<std::shared_ptr<PrimitiveC>>(cnode->input(0));
+    if (primitive_c == nullptr) {
+      MS_LOG(ERROR) << "primitive_c is null.";
+      return RET_ERROR;
+    }
+    auto op_name = cnode->fullname_with_scope();
+    MS_LOG(DEBUG) << "process node: " << op_name
+                  << " type: " << schema::EnumNamePrimitiveType((schema::PrimitiveType)primitive_c->Type());
+    if (quant_strategy_->CanConvOpQuantized(cnode) || quant_strategy_->CanMulOpQuantized(cnode)) {
+      auto input_node = cnode->input(2);
+      if (!input_node->isa<Parameter>()) {
+        MS_LOG(WARNING) << op_name << " the second input is not parameter";
+        continue;
+      }
+      auto param_node = input_node->cast<ParameterPtr>();
+      if (!param_node->has_default()) {
+        MS_LOG(WARNING) << op_name << " the second input can not convert to parameter";
+        continue;
+      }
+      auto param_value = std::static_pointer_cast<ParamValueLite>(param_node->default_param());
+      if (param_value == nullptr) {
+        MS_LOG(WARNING) << op_name << " the second input can not convert to parameter";
+        continue;
+      }
+      if (param_value->tensor_type() != TypeId::kNumberTypeFloat32) {
+        MS_LOG(WARNING) << op_name << " the second input type is not float";
+        continue;
+      }
+      // copy origin data in case to recover
+      auto *raw_data = static_cast<float *>(param_value->tensor_addr());
+      auto elem_count = param_value->tensor_shape_size();
+      auto origin_data = malloc(sizeof(float) * elem_count);
+      auto ret = memcpy_s(origin_data, sizeof(float) * elem_count, raw_data, param_value->tensor_size());
+      if (ret != EOK) {
+        MS_LOG(ERROR) << "memcpy fail: "
+                      << " dst size: " << sizeof(float) * elem_count << " src size: " << param_value->tensor_size();
+        return RET_ERROR;
+      }
+      // 1. try quant
+      for (int bit_num_t = 2; bit_num_t <= 8; bit_num_t++) {
+        type_id = TypeId::kNumberTypeInt8;
+        int quant_max_t = (1 << (unsigned int)(bit_num_t - 1)) - 1;
+        int quant_min_t = -(1 << (unsigned int)(bit_num_t - 1));
+
+        if (type_id == TypeId::kNumberTypeInt8) {
+          status = QuantFilter<int8_t>(param_value, primitive_c, QuantType::QuantType_WeightQuant, quant_max_t,
+                                       quant_min_t, bit_num_t, true);
+        } else if (type_id == TypeId::kNumberTypeInt16) {
+          status = QuantFilter<int16_t>(param_value, primitive_c, QuantType::QuantType_WeightQuant, quant_max_t,
+                                        quant_min_t, bit_num_t, true);
+        } else {
+          MS_LOG(ERROR) << "unexpected type_id: " << type_id;
+          return RET_ERROR;
+        }
+        if (status != RET_OK) {
+          MS_LOG(ERROR) << "quant filter fail.";
+          return RET_ERROR;
+        }
+        status = SetAbstract(param_value, param_node, primitive_c);
+        if (status != RET_OK) {
+          MS_LOG(ERROR) << "SetAbstract failed : " << status;
+          return RET_ERROR;
+        }
+        // 2. evaluate the quant
+        // 2.1 create quant session, get input, output tensor
+        flags.quantType = schema::QuantType_WeightQuant;
+        auto quant_session =
+          std::unique_ptr<session::LiteSession>(CreateSessionByFuncGraph(func_graph, flags, config_param_.thread_num));
+        if (quant_session == nullptr) {
+          MS_LOG(ERROR) << "create session error: " << status;
+          return RET_ERROR;
+        }
+        auto quant_inputs = quant_session->GetInputs();
+
+        auto mean_error = 0.0f;
+        if (fp32_inputs.size() != images_.size()) {
+          MS_LOG(ERROR) << "model's input tensor cnt: " << fp32_inputs.size() << " != " << images_.size();
+          return RET_ERROR;
+        }
+        auto image_cnt = images_.at(0).size();
+        for (size_t i = 0; i < image_cnt; i++) {
+          // set multi-input data
+          for (size_t input_index = 0; input_index < fp32_inputs.size(); input_index++) {
+            status = CopyInputDataToTensor(input_index, i, images_, fp32_inputs[input_index]);
+            if (status != RET_OK) {
+              MS_LOG(ERROR) << "generate input data from images failed!";
+              return RET_ERROR;
+            }
+            status = CopyInputDataToTensor(input_index, i, images_, quant_inputs[input_index]);
+            if (status != RET_OK) {
+              MS_LOG(ERROR) << "generate input data from images failed!";
+              return RET_ERROR;
+            }
+          }
+          std::future<STATUS> fp32_inference = std::async(
+            std::launch::async, [](session::LiteSession *fp32_session) -> STATUS { return fp32_session->RunGraph(); },
+            fp32_session_);
+
+          status = quant_session->RunGraph();
+          if (status != RET_OK) {
+            MS_LOG(ERROR) << "quant session run error";
+            return RET_ERROR;
+          }
+          status = fp32_inference.get();
+          if (status != RET_OK) {
+            MS_LOG(ERROR) << "fp32 session run error";
+            return RET_ERROR;
+          }
+          // 3. compare betwen quant and fp32
+          auto fp32_outputs = fp32_session_->GetOutputs();
+          auto quant_outputs = quant_session->GetOutputs();
+          mean_error += CompareOutputData<float>(fp32_outputs, quant_outputs);
+        }  // end_for: calib data loop
+        mean_error = mean_error / image_cnt;
+
+        if (mean_error <= config_param_.mean_error_threshold) {
+          MS_LOG(DEBUG) << "op: " << op_name << " got mixed bit: " << bit_num_t << " mean_error: " << mean_error;
+          opname_bit_[op_name] = bit_num_t;
+          break;
+        } else if (bit_num_t != 8) {
+          // recover
+          param_value->set_tensor_size(sizeof(float) * elem_count);
+          ret = memcpy_s(raw_data, param_value->tensor_size(), origin_data, sizeof(float) * elem_count);
+          if (ret != EOK) {
+            MS_LOG(ERROR) << "memcpy fail: "
+                          << " src size: " << sizeof(float) * elem_count << " dst size: " << param_value->tensor_size();
+            return RET_ERROR;
+          }
+        } else {
+          MS_LOG(DEBUG) << "op: " << op_name << " set bit: " << bit_num_t << " mean_error: " << mean_error;
+          opname_bit_[op_name] = bit_num_t;
+        }
+      }  // end bit loop
+      free(origin_data);
+    }  //  if: conv and matmul
+  }    // end loop: all cnode
+  return RET_OK;
+}
+
+STATUS WeightQuantizer::DoQuantize(FuncGraphPtr func_graph) {
+  MS_ASSERT(func_graph != nullptr);
   STATUS ret;
-  auto cnodes = funcGraph->GetOrderedCnodes();
+  auto cnodes = func_graph->GetOrderedCnodes();
+
+  if (!config_file_.empty()) {
+    ret = ParseConfigFile(config_file_, &config_param_);
+    if (ret != RET_OK) {
+      MS_LOG(ERROR) << "ReadConfig error.";
+      return RET_ERROR;
+    }
+  }
+
+  if (config_param_.mixed) {
+    MS_LOG(INFO) << "Do mixed bit quantization";
+    return DoMiexedQuant(func_graph);
+  }
+
   ret = DoConvQuantize(cnodes);
   if (ret != RET_OK) {
     MS_LOG(ERROR) << "DoConvQuantize failed :" << ret;
diff --git a/mindspore/lite/tools/converter/quantizer/weight_quantizer.h b/mindspore/lite/tools/converter/quantizer/weight_quantizer.h
index 7e91153ee4d..7e7494d2b23 100644
--- a/mindspore/lite/tools/converter/quantizer/weight_quantizer.h
+++ b/mindspore/lite/tools/converter/quantizer/weight_quantizer.h
@@ -17,9 +17,12 @@
 #ifndef MINDSPORE_LITE_TOOLS_CONVERTER_QUANTIZER_WEIGHT_QUANTIZER_H
 #define MINDSPORE_LITE_TOOLS_CONVERTER_QUANTIZER_WEIGHT_QUANTIZER_H
 
+#include <future>
 #include <memory>
+#include <map>
 #include <list>
 #include <string>
+#include <vector>
 #include "tools/converter/quantizer/quantizer.h"
 #include "tools/converter/quantizer/quantize_util.h"
 #include "ir/func_graph.h"
@@ -27,27 +30,37 @@
 #include "include/model.h"
 #include "base/base.h"
 #include "abstract/dshape.h"
+#include "src/lite_session.h"
 
 namespace mindspore::lite::quant {
 class WeightQuantizer : public Quantizer {
  public:
-  WeightQuantizer(FuncGraphPtr graph, const std::string &weightSize, const std::string &covWeightChannelThreshold,
-                  const std::string &bitNum);
+  WeightQuantizer(FuncGraphPtr graph, const std::string &config_file, const std::string &weightSize,
+                  const std::string &covWeightChannelThreshold, const std::string &bitNum);
+  WeightQuantizer(FuncGraphPtr graph, const PostQuantConfig &config);
+  ~WeightQuantizer();
 
-  ~WeightQuantizer() = default;
-
-  STATUS DoQuantize(FuncGraphPtr funcGraph) override;
+  STATUS DoQuantize(FuncGraphPtr func_graph) override;
   STATUS DoConvQuantize(const std::list<CNodePtr> &nodes);
   STATUS DoMulQuantize(const std::list<CNodePtr> &nodes);
   static STATUS WeightQuantInputCheck(const converter::Flags *config);
   static bool IsPosNum(const std::string &str);
+
   int quant_max;
   int quant_min;
   TypeId type_id{kTypeUnknown};
+  std::map<std::string, int> opname_bit_;
 
  private:
-  std::unique_ptr<QuantStrategy> mStrategy;
-  size_t bitNum;
+  std::unique_ptr<QuantStrategy> quant_strategy_;
+  size_t bit_num_;
+  std::string config_file_;
+  PostQuantConfig config_param_;
+  std::vector<std::vector<std::string>> images_;  // multi_input, [[mode_input_0], [model_input_1]...]
+  session::LiteSession *fp32_session_ = nullptr;
+
+  STATUS DoMiexedQuant(FuncGraphPtr);
+  STATUS SetAbstract(ParamValueLitePtr param_value, ParameterPtr param_node, std::shared_ptr<PrimitiveC> primitive_c);
 };
 }  // namespace mindspore::lite::quant
 #endif