diff --git a/include/api/dual_abi_helper.h b/include/api/dual_abi_helper.h
index 1804ad8a9e8..4c35255d5ac 100644
--- a/include/api/dual_abi_helper.h
+++ b/include/api/dual_abi_helper.h
@@ -67,18 +67,20 @@ inline std::set<std::string> SetCharToString(const std::set<std::vector<char>> &
   return ret;
 }
 
-inline std::map<std::vector<char>, int32_t> MapStringToChar(const std::map<std::string, int32_t> &s) {
-  std::map<std::vector<char>, int32_t> ret;
+template <class T>
+inline std::map<std::vector<char>, T> MapStringToChar(const std::map<std::string, T> &s) {
+  std::map<std::vector<char>, T> ret;
   std::transform(s.begin(), s.end(), std::inserter(ret, ret.begin()), [](auto str) {
-    return std::pair<std::vector<char>, int32_t>(std::vector<char>(str.first.begin(), str.first.end()), str.second);
+    return std::pair<std::vector<char>, T>(std::vector<char>(str.first.begin(), str.first.end()), str.second);
   });
   return ret;
 }
 
-inline std::map<std::string, int32_t> MapCharToString(const std::map<std::vector<char>, int32_t> &c) {
-  std::map<std::string, int32_t> ret;
+template <class T>
+inline std::map<std::string, T> MapCharToString(const std::map<std::vector<char>, T> &c) {
+  std::map<std::string, T> ret;
   std::transform(c.begin(), c.end(), std::inserter(ret, ret.begin()), [](auto ch) {
-    return std::pair<std::string, int32_t>(std::string(ch.first.begin(), ch.first.end()), ch.second);
+    return std::pair<std::string, T>(std::string(ch.first.begin(), ch.first.end()), ch.second);
   });
   return ret;
 }
@@ -151,24 +153,6 @@ inline std::vector<std::pair<std::vector<char>, int64_t>> PairStringInt64ToPairC
   return ret;
 }
 
-template <class T>
-inline std::map<std::vector<char>, T> PadInfoStringToChar(const std::map<std::string, T> &s_pad_info) {
-  std::map<std::vector<char>, T> ret;
-  std::transform(s_pad_info.begin(), s_pad_info.end(), std::inserter(ret, ret.begin()), [](auto str) {
-    return std::pair<std::vector<char>, T>(std::vector<char>(str.first.begin(), str.first.end()), str.second);
-  });
-  return ret;
-}
-
-template <class T>
-inline std::map<std::string, T> PadInfoCharToString(const std::map<std::vector<char>, T> &c_pad_info) {
-  std::map<std::string, T> ret;
-  std::transform(c_pad_info.begin(), c_pad_info.end(), std::inserter(ret, ret.begin()), [](auto ch) {
-    return std::pair<std::string, T>(std::string(ch.first.begin(), ch.first.end()), ch.second);
-  });
-  return ret;
-}
-
 template <class T>
 inline void TensorMapCharToString(const std::map<std::vector<char>, T> *c, std::unordered_map<std::string, T> *s) {
   if (c == nullptr || s == nullptr) {
diff --git a/include/api/serialization.h b/include/api/serialization.h
index 27a1ede0b1c..0532583243a 100644
--- a/include/api/serialization.h
+++ b/include/api/serialization.h
@@ -129,7 +129,7 @@ Status Serialization::Load(const std::vector<std::string> &files, ModelType mode
 }
 
 Status Serialization::SetParameters(const std::map<std::string, Buffer> &parameters, Model *model) {
-  return SetParameters(PadInfoStringToChar<Buffer>(parameters), model);
+  return SetParameters(MapStringToChar<Buffer>(parameters), model);
 }
 
 Status Serialization::ExportModel(const Model &model, ModelType model_type, const std::string &model_file,
diff --git a/mindspore/ccsrc/minddata/dataset/api/datasets.cc b/mindspore/ccsrc/minddata/dataset/api/datasets.cc
index e77701c0310..080b86b40d2 100644
--- a/mindspore/ccsrc/minddata/dataset/api/datasets.cc
+++ b/mindspore/ccsrc/minddata/dataset/api/datasets.cc
@@ -446,9 +446,9 @@ BucketBatchByLengthDataset::BucketBatchByLengthDataset(
   if (input == nullptr) {
     ir_node_ = nullptr;
   } else {
-    auto ds = std::make_shared<BucketBatchByLengthNode>(
-      input->IRNode(), VectorCharToString(column_names), bucket_boundaries, bucket_batch_sizes, c_func,
-      PadInfoCharToString(map), pad_to_bucket_boundary, drop_remainder);
+    auto ds = std::make_shared<BucketBatchByLengthNode>(input->IRNode(), VectorCharToString(column_names),
+                                                        bucket_boundaries, bucket_batch_sizes, c_func,
+                                                        MapCharToString(map), pad_to_bucket_boundary, drop_remainder);
 
     ir_node_ = std::static_pointer_cast<DatasetNode>(ds);
   }
diff --git a/mindspore/ccsrc/minddata/dataset/include/dataset/datasets.h b/mindspore/ccsrc/minddata/dataset/include/dataset/datasets.h
index 6381ea4f358..42aaf86b834 100644
--- a/mindspore/ccsrc/minddata/dataset/include/dataset/datasets.h
+++ b/mindspore/ccsrc/minddata/dataset/include/dataset/datasets.h
@@ -262,7 +262,7 @@ class DATASET_API Dataset : public std::enable_shared_from_this<Dataset> {
     bool pad_to_bucket_boundary = false, bool drop_remainder = false) {
     return std::make_shared<BucketBatchByLengthDataset>(
       shared_from_this(), VectorStringToChar(column_names), bucket_boundaries, bucket_batch_sizes,
-      element_length_function, PadInfoStringToChar(pad_info), pad_to_bucket_boundary, drop_remainder);
+      element_length_function, MapStringToChar(pad_info), pad_to_bucket_boundary, drop_remainder);
   }
 
   /// \brief Function to create a SentencePieceVocab from source dataset.
diff --git a/mindspore/lite/include/converter.h b/mindspore/lite/include/converter.h
index b5eb2d713ef..dcb2fd6a031 100644
--- a/mindspore/lite/include/converter.h
+++ b/mindspore/lite/include/converter.h
@@ -23,26 +23,27 @@
 #include "include/api/format.h"
 #include "include/api/status.h"
 #include "include/registry/converter_context.h"
+#include "include/api/dual_abi_helper.h"
 
 namespace mindspore {
 struct ConverterPara;
 class MS_API Converter {
  public:
-  Converter(converter::FmkType fmk_type, const std::string &model_file, const std::string &output_file = "",
-            const std::string &weight_file = "");
+  inline Converter(converter::FmkType fmk_type, const std::string &model_file, const std::string &output_file = "",
+                   const std::string &weight_file = "");
   ~Converter() = default;
 
-  void SetConfigFile(const std::string &config_file);
-  std::string GetConfigFile() const;
+  inline void SetConfigFile(const std::string &config_file);
+  inline std::string GetConfigFile() const;
 
-  void SetConfigInfo(const std::string &section, const std::map<std::string, std::string> &config);
-  std::map<std::string, std::map<std::string, std::string>> GetConfigInfo() const;
+  inline void SetConfigInfo(const std::string &section, const std::map<std::string, std::string> &config);
+  inline std::map<std::string, std::map<std::string, std::string>> GetConfigInfo() const;
 
   void SetWeightFp16(bool weight_fp16);
   bool GetWeightFp16() const;
 
-  void SetInputShape(const std::map<std::string, std::vector<int64_t>> &input_shape);
-  std::map<std::string, std::vector<int64_t>> GetInputShape() const;
+  inline void SetInputShape(const std::map<std::string, std::vector<int64_t>> &input_shape);
+  inline std::map<std::string, std::vector<int64_t>> GetInputShape() const;
 
   void SetInputFormat(Format format);
   Format GetInputFormat() const;
@@ -56,17 +57,17 @@ class MS_API Converter {
   void SetExportMindIR(ModelType export_mindir);
   ModelType GetExportMindIR() const;
 
-  void SetDecryptKey(const std::string &key);
-  std::string GetDecryptKey() const;
+  inline void SetDecryptKey(const std::string &key);
+  inline std::string GetDecryptKey() const;
 
-  void SetDecryptMode(const std::string &mode);
-  std::string GetDecryptMode() const;
+  inline void SetDecryptMode(const std::string &mode);
+  inline std::string GetDecryptMode() const;
 
   void SetEnableEncryption(bool encryption);
   bool GetEnableEncryption() const;
 
-  void SetEncryptKey(const std::string &key);
-  std::string GetEncryptKey() const;
+  inline void SetEncryptKey(const std::string &key);
+  inline std::string GetEncryptKey() const;
 
   void SetInfer(bool infer);
   bool GetInfer() const;
@@ -77,14 +78,70 @@ class MS_API Converter {
   void SetNoFusion(bool no_fusion);
   bool GetNoFusion();
 
-  void SetDevice(const std::string &device);
-  std::string GetDevice();
+  inline void SetDevice(const std::string &device);
+  inline std::string GetDevice();
 
   Status Convert();
   void *Convert(size_t *data_size);
 
  private:
+  Converter(converter::FmkType fmk_type, const std::vector<char> &model_file, const std::vector<char> &output_file,
+            const std::vector<char> &weight_file);
+  void SetConfigFile(const std::vector<char> &config_file);
+  std::vector<char> GetConfigFileChar() const;
+  void SetConfigInfo(const std::vector<char> &section, const std::map<std::vector<char>, std::vector<char>> &config);
+  std::map<std::vector<char>, std::map<std::vector<char>, std::vector<char>>> GetConfigInfoChar() const;
+  void SetInputShape(const std::map<std::vector<char>, std::vector<int64_t>> &input_shape);
+  std::map<std::vector<char>, std::vector<int64_t>> GetInputShapeChar() const;
+  void SetDecryptKey(const std::vector<char> &key);
+  std::vector<char> GetDecryptKeyChar() const;
+  void SetDecryptMode(const std::vector<char> &mode);
+  std::vector<char> GetDecryptModeChar() const;
+  void SetEncryptKey(const std::vector<char> &key);
+  std::vector<char> GetEncryptKeyChar() const;
+  void SetDevice(const std::vector<char> &device);
+  std::vector<char> GetDeviceChar();
   std::shared_ptr<ConverterPara> data_;
 };
+
+Converter::Converter(converter::FmkType fmk_type, const std::string &model_file, const std::string &output_file,
+                     const std::string &weight_file)
+    : Converter(fmk_type, StringToChar(model_file), StringToChar(output_file), StringToChar(weight_file)) {}
+
+void Converter::SetConfigFile(const std::string &config_file) { SetConfigFile(StringToChar(config_file)); }
+
+std::string Converter::GetConfigFile() const { return CharToString(GetConfigFileChar()); }
+
+void Converter::SetConfigInfo(const std::string &section, const std::map<std::string, std::string> &config) {
+  SetConfigInfo(StringToChar(section), MapStringToVectorChar(config));
+}
+
+std::map<std::string, std::map<std::string, std::string>> Converter::GetConfigInfo() const {
+  return MapMapCharToString(GetConfigInfoChar());
+}
+
+void Converter::SetInputShape(const std::map<std::string, std::vector<int64_t>> &input_shape) {
+  SetInputShape(MapStringToChar(input_shape));
+}
+
+std::map<std::string, std::vector<int64_t>> Converter::GetInputShape() const {
+  return MapCharToString(GetInputShapeChar());
+}
+
+void Converter::SetDecryptKey(const std::string &key) { SetDecryptKey(StringToChar(key)); }
+
+std::string Converter::GetDecryptKey() const { return CharToString(GetDecryptKeyChar()); }
+
+void Converter::SetDecryptMode(const std::string &mode) { SetDecryptMode(StringToChar(mode)); }
+
+std::string Converter::GetDecryptMode() const { return CharToString(GetDecryptModeChar()); }
+
+void Converter::SetEncryptKey(const std::string &key) { SetEncryptKey(StringToChar(key)); }
+
+std::string Converter::GetEncryptKey() const { return CharToString(GetEncryptKeyChar()); }
+
+void Converter::SetDevice(const std::string &device) { SetDevice(StringToChar(device)); }
+
+std::string Converter::GetDevice() { return CharToString(GetDeviceChar()); }
 }  // namespace mindspore
 #endif  // MINDSPORE_LITE_INCLUDE_CONVERTER_H_
diff --git a/mindspore/lite/python/src/converter_pybind.cc b/mindspore/lite/python/src/converter_pybind.cc
index 56f1b35fc3b..6d29c72f2d1 100644
--- a/mindspore/lite/python/src/converter_pybind.cc
+++ b/mindspore/lite/python/src/converter_pybind.cc
@@ -32,13 +32,15 @@ void ConverterPyBind(const py::module &m) {
 
   py::class_<Converter, std::shared_ptr<Converter>>(m, "ConverterBind")
     .def(py::init<converter::FmkType, const std::string &, const std::string &, const std::string &>())
-    .def("set_config_file", &Converter::SetConfigFile)
+    .def("set_config_file", py::overload_cast<const std::string &>(&Converter::SetConfigFile))
     .def("get_config_file", &Converter::GetConfigFile)
-    .def("set_config_info", &Converter::SetConfigInfo)
+    .def("set_config_info",
+         py::overload_cast<const std::string &, const std::map<std::string, std::string> &>(&Converter::SetConfigInfo))
     .def("get_config_info", &Converter::GetConfigInfo)
     .def("set_weight_fp16", &Converter::SetWeightFp16)
     .def("get_weight_fp16", &Converter::GetWeightFp16)
-    .def("set_input_shape", &Converter::SetInputShape)
+    .def("set_input_shape",
+         py::overload_cast<const std::map<std::string, std::vector<int64_t>> &>(&Converter::SetInputShape))
     .def("get_input_shape", &Converter::GetInputShape)
     .def("set_input_format", &Converter::SetInputFormat)
     .def("get_input_format", &Converter::GetInputFormat)
@@ -48,13 +50,13 @@ void ConverterPyBind(const py::module &m) {
     .def("get_output_data_type", &Converter::GetOutputDataType)
     .def("set_export_mindir", &Converter::SetExportMindIR)
     .def("get_export_mindir", &Converter::GetExportMindIR)
-    .def("set_decrypt_key", &Converter::SetDecryptKey)
+    .def("set_decrypt_key", py::overload_cast<const std::string &>(&Converter::SetDecryptKey))
     .def("get_decrypt_key", &Converter::GetDecryptKey)
-    .def("set_decrypt_mode", &Converter::SetDecryptMode)
+    .def("set_decrypt_mode", py::overload_cast<const std::string &>(&Converter::SetDecryptMode))
     .def("get_decrypt_mode", &Converter::GetDecryptMode)
     .def("set_enable_encryption", &Converter::SetEnableEncryption)
     .def("get_enable_encryption", &Converter::GetEnableEncryption)
-    .def("set_encrypt_key", &Converter::SetEncryptKey)
+    .def("set_encrypt_key", py::overload_cast<const std::string &>(&Converter::SetEncryptKey))
     .def("get_encrypt_key", &Converter::GetEncryptKey)
     .def("set_infer", &Converter::SetInfer)
     .def("get_infer", &Converter::GetInfer)
diff --git a/mindspore/lite/tools/converter/cxx_api/converter.cc b/mindspore/lite/tools/converter/cxx_api/converter.cc
index 62520bc09dd..ba168675eb2 100644
--- a/mindspore/lite/tools/converter/cxx_api/converter.cc
+++ b/mindspore/lite/tools/converter/cxx_api/converter.cc
@@ -28,54 +28,57 @@ constexpr size_t kMaxConfigNumPerSection = 1000;
 namespace lite {
 int RunConverter(const std::shared_ptr<ConverterPara> &data_);
 }
-Converter::Converter(converter::FmkType fmk_type, const std::string &model_file, const std::string &output_file,
-                     const std::string &weight_file) {
+Converter::Converter(converter::FmkType fmk_type, const std::vector<char> &model_file,
+                     const std::vector<char> &output_file, const std::vector<char> &weight_file) {
   data_ = std::make_shared<ConverterPara>();
   if (data_ != nullptr) {
     data_->fmk_type = fmk_type;
-    data_->model_file = model_file;
-    data_->output_file = output_file;
-    data_->weight_file = weight_file;
+    data_->model_file = CharToString(model_file);
+    data_->output_file = CharToString(output_file);
+    data_->weight_file = CharToString(weight_file);
   } else {
     MS_LOG(ERROR) << "Create ConverterPara failed";
   }
 }
 
-void Converter::SetConfigFile(const std::string &config_file) {
+void Converter::SetConfigFile(const std::vector<char> &config_file) {
   if (data_ != nullptr) {
-    data_->config_file = config_file;
+    data_->config_file = CharToString(config_file);
   }
 }
 
-std::string Converter::GetConfigFile() const {
+std::vector<char> Converter::GetConfigFileChar() const {
+  std::string cfg_file = "";
   if (data_ != nullptr) {
-    return data_->config_file;
-  } else {
-    return "";
+    cfg_file = data_->config_file;
   }
+  return StringToChar(cfg_file);
 }
 
-void Converter::SetConfigInfo(const std::string &section, const std::map<std::string, std::string> &config) {
+void Converter::SetConfigInfo(const std::vector<char> &section,
+                              const std::map<std::vector<char>, std::vector<char>> &config) {
+  auto section_str = CharToString(section);
+  auto config_str = MapVectorCharToString(config);
   if (data_ != nullptr) {
     if (data_->config_param.size() > kMaxSectionNum) {
       MS_LOG(ERROR) << "Section num " << data_->config_param.size() << "exceeds max num " << kMaxSectionNum;
       return;
     }
-    if (data_->config_param.find(section) != data_->config_param.end()) {
-      MS_LOG(WARNING) << "Section " << section << "already exists, "
+    if (data_->config_param.find(section_str) != data_->config_param.end()) {
+      MS_LOG(WARNING) << "Section " << section_str << "already exists, "
                       << "value will be overwrite.";
     }
     if (config.size() > kMaxConfigNumPerSection) {
       MS_LOG(ERROR) << "Config num " << config.size() << " exceeds max num " << kMaxConfigNumPerSection << " in "
-                    << section;
+                    << section_str;
       return;
     }
-    data_->config_param[section] = config;
+    data_->config_param[section_str] = config_str;
   }
 }
 
-std::map<std::string, std::map<std::string, std::string>> Converter::GetConfigInfo() const {
-  return data_->config_param;
+std::map<std::vector<char>, std::map<std::vector<char>, std::vector<char>>> Converter::GetConfigInfoChar() const {
+  return MapMapStringToChar(data_->config_param);
 }
 
 void Converter::SetWeightFp16(bool weight_fp16) {
@@ -92,21 +95,22 @@ bool Converter::GetWeightFp16() const {
   }
 }
 
-void Converter::SetInputShape(const std::map<std::string, std::vector<int64_t>> &input_shape) {
+void Converter::SetInputShape(const std::map<std::vector<char>, std::vector<int64_t>> &input_shape) {
+  auto input_shape_str = MapCharToString(input_shape);
   if (data_ != nullptr) {
-    for (auto &it : input_shape) {
+    for (auto &it : input_shape_str) {
       lite::ConverterInnerContext::GetInstance()->UpdateGraphInputTensorShape(it.first, it.second);
     }
-    data_->input_shape = input_shape;
+    data_->input_shape = input_shape_str;
   }
 }
 
-std::map<std::string, std::vector<int64_t>> Converter::GetInputShape() const {
+std::map<std::vector<char>, std::vector<int64_t>> Converter::GetInputShapeChar() const {
+  std::map<std::string, std::vector<int64_t>> input_shape = {};
   if (data_ != nullptr) {
-    return data_->input_shape;
-  } else {
-    return {};
+    input_shape = data_->input_shape;
   }
+  return MapStringToChar(input_shape);
 }
 
 void Converter::SetInputFormat(Format format) {
@@ -168,32 +172,32 @@ ModelType Converter::GetExportMindIR() const {
   }
 }
 
-void Converter::SetDecryptKey(const std::string &key) {
+void Converter::SetDecryptKey(const std::vector<char> &key) {
   if (data_ != nullptr) {
-    data_->decrypt_key = key;
+    data_->decrypt_key = CharToString(key);
   }
 }
 
-std::string Converter::GetDecryptKey() const {
+std::vector<char> Converter::GetDecryptKeyChar() const {
+  std::string decrypt_key = "";
   if (data_ != nullptr) {
-    return data_->decrypt_key;
-  } else {
-    return "";
+    decrypt_key = data_->decrypt_key;
+  }
+  return StringToChar(decrypt_key);
+}
+
+void Converter::SetDecryptMode(const std::vector<char> &mode) {
+  if (data_ != nullptr) {
+    data_->decrypt_mode = CharToString(mode);
   }
 }
 
-void Converter::SetDecryptMode(const std::string &mode) {
+std::vector<char> Converter::GetDecryptModeChar() const {
+  std::string decrypt_mode = "";
   if (data_ != nullptr) {
-    data_->decrypt_mode = mode;
-  }
-}
-
-std::string Converter::GetDecryptMode() const {
-  if (data_ != nullptr) {
-    return data_->decrypt_mode;
-  } else {
-    return "";
+    decrypt_mode = data_->decrypt_mode;
   }
+  return StringToChar(decrypt_mode);
 }
 
 void Converter::SetEnableEncryption(bool encryption) {
@@ -210,18 +214,18 @@ bool Converter::GetEnableEncryption() const {
   }
 }
 
-void Converter::SetEncryptKey(const std::string &key) {
+void Converter::SetEncryptKey(const std::vector<char> &key) {
   if (data_ != nullptr) {
-    data_->encrypt_key = key;
+    data_->encrypt_key = CharToString(key);
   }
 }
 
-std::string Converter::GetEncryptKey() const {
+std::vector<char> Converter::GetEncryptKeyChar() const {
+  std::string encrypt_key = "";
   if (data_ != nullptr) {
-    return data_->encrypt_key;
-  } else {
-    return "";
+    encrypt_key = data_->encrypt_key;
   }
+  return StringToChar(encrypt_key);
 }
 
 void Converter::SetInfer(bool infer) {
@@ -266,18 +270,18 @@ bool Converter::GetNoFusion() {
   }
 }
 
-void Converter::SetDevice(const std::string &device) {
+void Converter::SetDevice(const std::vector<char> &device) {
   if (data_ != nullptr) {
-    data_->device = device;
+    data_->device = CharToString(device);
   }
 }
 
-std::string Converter::GetDevice() {
+std::vector<char> Converter::GetDeviceChar() {
+  std::string device = "";
   if (data_ != nullptr) {
-    return data_->device;
-  } else {
-    return "";
+    device = data_->device;
   }
+  return StringToChar(device);
 }
 
 Status Converter::Convert() {