diff --git a/mindspore/lite/src/kernel_registry.cc b/mindspore/lite/src/kernel_registry.cc
index ebdc27a739c..5e536c9b00b 100644
--- a/mindspore/lite/src/kernel_registry.cc
+++ b/mindspore/lite/src/kernel_registry.cc
@@ -102,8 +102,13 @@ kernel::LiteKernel *KernelRegistry::GetKernel(const std::vector<Tensor *> &in_te
                                               const InnerContext *ctx, const kernel::KernelKey &key) {
   MS_ASSERT(nullptr != primitive);
   MS_ASSERT(nullptr != ctx);
-  auto parameter =
-    PopulateRegistry::GetInstance()->getParameterCreator(schema::PrimitiveType(primitive->Type()))(primitive);
+  auto func_pointer = PopulateRegistry::GetInstance()->GetParameterCreator(schema::PrimitiveType(primitive->Type()));
+  if (func_pointer == nullptr) {
+    MS_LOG(ERROR) << "ParameterCreator function pointer is nullptr, type: "
+                  << schema::EnumNamePrimitiveType((schema::PrimitiveType)primitive->Type());
+    return nullptr;
+  }
+  auto parameter = func_pointer(primitive);
   if (parameter == nullptr) {
     MS_LOG(ERROR) << "PopulateParameter return nullptr, type: "
                   << schema::EnumNamePrimitiveType((schema::PrimitiveType)primitive->Type());
diff --git a/mindspore/lite/src/lite_kernel.cc b/mindspore/lite/src/lite_kernel.cc
index 26648adc0cc..f0ea27d8bf9 100644
--- a/mindspore/lite/src/lite_kernel.cc
+++ b/mindspore/lite/src/lite_kernel.cc
@@ -18,6 +18,7 @@
 #include <algorithm>
 #include <queue>
 #include "src/tensor.h"
+#include "src/common/utils.h"
 
 namespace mindspore::kernel {
 using mindspore::lite::RET_ERROR;
@@ -196,7 +197,9 @@ std::vector<lite::Tensor *> LiteKernelUtil::SubgraphInputTensors(const std::vect
     if (outer_in_kernels.empty()) {
       for (auto &in_kernel_in_tensor : in_kernel_in_tensors) {
         if (!in_kernel_in_tensor->IsConst()) {
-          input_tensors.push_back(in_kernel_in_tensor);
+          if (!lite::IsContain(input_tensors, in_kernel_in_tensor)) {
+            input_tensors.push_back(in_kernel_in_tensor);
+          }
         }
       }
       continue;
@@ -211,7 +214,9 @@ std::vector<lite::Tensor *> LiteKernelUtil::SubgraphInputTensors(const std::vect
         auto outer_in_kernel_out_tensors_iter =
           std::find(outer_in_kernel_out_tensors.begin(), outer_in_kernel_out_tensors.end(), in_kernel_in_tensor);
         if (outer_in_kernel_out_tensors_iter != outer_in_kernel_out_tensors.end()) {
-          input_tensors.emplace_back(in_kernel_in_tensor);
+          if (!lite::IsContain(input_tensors, in_kernel_in_tensor)) {
+            input_tensors.emplace_back(in_kernel_in_tensor);
+          }
         }
       }
     }
@@ -226,7 +231,11 @@ std::vector<lite::Tensor *> LiteKernelUtil::SubgraphOutputTensors(const std::vec
     auto &outer_out_kernels = output_kernel->out_kernels();
     auto &out_kernel_out_tensors = output_kernel->out_tensors();
     if (outer_out_kernels.empty()) {
-      output_tensors.insert(output_tensors.end(), out_kernel_out_tensors.begin(), out_kernel_out_tensors.end());
+      for (auto out_kernel_out_tensor : out_kernel_out_tensors) {
+        if (!lite::IsContain(output_tensors, out_kernel_out_tensor)) {
+          output_tensors.push_back(out_kernel_out_tensor);
+        }
+      }
       continue;
     }
     for (auto outer_out_kernel : outer_out_kernels) {
@@ -239,7 +248,9 @@ std::vector<lite::Tensor *> LiteKernelUtil::SubgraphOutputTensors(const std::vec
         auto outer_out_kernel_in_tensors_iter =
           std::find(outer_out_kernel_in_tensors.begin(), outer_out_kernel_in_tensors.end(), out_kernel_out_tensor);
         if (outer_out_kernel_in_tensors_iter != outer_out_kernel_in_tensors.end()) {
-          output_tensors.emplace_back(out_kernel_out_tensor);
+          if (!lite::IsContain(output_tensors, out_kernel_out_tensor)) {
+            output_tensors.emplace_back(out_kernel_out_tensor);
+          }
         }
       }
     }
diff --git a/mindspore/lite/src/model_common.h b/mindspore/lite/src/model_common.h
index 041ec0b7a6d..e2a68a49304 100644
--- a/mindspore/lite/src/model_common.h
+++ b/mindspore/lite/src/model_common.h
@@ -50,7 +50,14 @@ bool ConvertNodes(const T &meta_graph, Model *model, int schema_version = SCHEMA
     node->primitive_ = PrimitiveC::Create(const_cast<schema::Primitive *>(src_prim));
 #else
     auto primitive = const_cast<schema::Primitive *>(src_prim);
-    node->primitive_ = OpsRegistry::GetInstance()->getPrimitiveCreator(primitive->value_type())(primitive);
+    auto func_pointer = OpsRegistry::GetInstance()->GetPrimitiveCreator(primitive->value_type());
+    if (func_pointer == nullptr) {
+      MS_LOG(ERROR) << "PrimitiveCreator function pointer is nullptr, type: "
+                    << schema::EnumNamePrimitiveType(primitive->value_type());
+      delete node;
+      return false;
+    }
+    node->primitive_ = func_pointer(primitive);
 #endif
     if (node->primitive_ == nullptr) {
       MS_LOG(ERROR) << "unpack primitive == nullptr!";
diff --git a/mindspore/lite/src/ops/ops_register.h b/mindspore/lite/src/ops/ops_register.h
index e86f00dde46..969f925f008 100644
--- a/mindspore/lite/src/ops/ops_register.h
+++ b/mindspore/lite/src/ops/ops_register.h
@@ -28,10 +28,10 @@ class OpsRegistry {
     return &registry;
   }
 
-  void insertPrimitiveCMap(schema::PrimitiveType type, PrimitiveCCreator creator) {
+  void InsertPrimitiveCMap(schema::PrimitiveType type, PrimitiveCCreator creator) {
     primitive_creators[type] = creator;
   }
-  PrimitiveCCreator getPrimitiveCreator(schema::PrimitiveType type) {
+  PrimitiveCCreator GetPrimitiveCreator(schema::PrimitiveType type) {
     if (primitive_creators.find(type) != primitive_creators.end()) {
       return primitive_creators[type];
     } else {
@@ -47,7 +47,7 @@ class OpsRegistry {
 class Registry {
  public:
   Registry(schema::PrimitiveType primitive_type, PrimitiveCCreator creator) {
-    OpsRegistry::GetInstance()->insertPrimitiveCMap(primitive_type, creator);
+    OpsRegistry::GetInstance()->InsertPrimitiveCMap(primitive_type, creator);
   }
 };
 
diff --git a/mindspore/lite/src/ops/populate/populate_register.h b/mindspore/lite/src/ops/populate/populate_register.h
index 704be5c4e3c..9e80d30c417 100644
--- a/mindspore/lite/src/ops/populate/populate_register.h
+++ b/mindspore/lite/src/ops/populate/populate_register.h
@@ -18,6 +18,7 @@
 #define LITE_MINDSPORE_LITE_C_OPS_OP_POPULATE_REGISTER_H
 
 #include <map>
+#include "src/ops/primitive_c.h"
 
 namespace mindspore {
 namespace lite {
@@ -29,9 +30,9 @@ class PopulateRegistry {
     return &registry;
   }
 
-  void insertParameterMap(schema::PrimitiveType type, ParameterCreator creator) { parameter_creators[type] = creator; }
+  void InsertParameterMap(schema::PrimitiveType type, ParameterCreator creator) { parameter_creators[type] = creator; }
 
-  ParameterCreator getParameterCreator(schema::PrimitiveType type) {
+  ParameterCreator GetParameterCreator(schema::PrimitiveType type) {
     if (parameter_creators.find(type) != parameter_creators.end()) {
       return parameter_creators[type];
     } else {
@@ -47,7 +48,7 @@ class PopulateRegistry {
 class Registry {
  public:
   Registry(schema::PrimitiveType primitive_type, ParameterCreator creator) {
-    PopulateRegistry::GetInstance()->insertParameterMap(primitive_type, creator);
+    PopulateRegistry::GetInstance()->InsertParameterMap(primitive_type, creator);
   }
   ~Registry() = default;
 };
diff --git a/mindspore/lite/tools/optimizer/fusion/constant_folding_fusion.cc b/mindspore/lite/tools/optimizer/fusion/constant_folding_fusion.cc
index 566ddb0d936..1c6d1beada3 100644
--- a/mindspore/lite/tools/optimizer/fusion/constant_folding_fusion.cc
+++ b/mindspore/lite/tools/optimizer/fusion/constant_folding_fusion.cc
@@ -244,8 +244,14 @@ const AnfNodePtr ConstFoldPass::Process(const FuncGraphPtr &func_graph, const An
     auto primitive = lite_primitive.get();
     MS_ASSERT(primitive != nullptr);
     MS_ASSERT(primitive->Type() != nullptr);
-    auto parameter =
-      lite::PopulateRegistry::GetInstance()->getParameterCreator(schema::PrimitiveType(primitive->Type()))(primitive);
+    auto func_pointer =
+      lite::PopulateRegistry::GetInstance()->GetParameterCreator(schema::PrimitiveType(primitive->Type()));
+    if (func_pointer == nullptr) {
+      MS_LOG(ERROR) << "ParameterCreator function pointer is nullptr, type: "
+                    << schema::EnumNamePrimitiveType((schema::PrimitiveType)primitive->Type());
+      return nullptr;
+    }
+    auto parameter = func_pointer(primitive);
 
     if (parameter == nullptr) {
       MS_LOG(ERROR) << "PopulateParameter return nullptr, type: "