diff --git a/mindspore/lite/src/param_value_lite.h b/mindspore/lite/src/param_value_lite.h
index 87fdc4628e..f747042575 100644
--- a/mindspore/lite/src/param_value_lite.h
+++ b/mindspore/lite/src/param_value_lite.h
@@ -29,7 +29,14 @@ namespace mindspore {
 class ParamValueLite : public Value {
  public:
   ParamValueLite() : tensor_addr_(nullptr), tensor_size_(0) {}
-  virtual ~ParamValueLite() = default;
+  virtual ~ParamValueLite() {
+    if (tensor_addr_ != nullptr) {
+      auto tensor_mem = reinterpret_cast<char*>(tensor_addr_);
+      delete tensor_mem;
+      tensor_addr_ = nullptr;
+      tensor_size_ = 0;
+    }
+  }
 
   size_t tensor_size() const { return tensor_size_; }
   void set_tensor_size(size_t size) { tensor_size_ = size; }
diff --git a/mindspore/lite/tools/anf_importer/import_from_protobuf.cc b/mindspore/lite/tools/anf_importer/import_from_protobuf.cc
index b6a39f382b..bee80a5347 100644
--- a/mindspore/lite/tools/anf_importer/import_from_protobuf.cc
+++ b/mindspore/lite/tools/anf_importer/import_from_protobuf.cc
@@ -137,6 +137,7 @@ bool AnfImporterFromProtobuf::BuildParameterForFuncGraph(const ParameterPtr &nod
     std::string initial_data = initialize_proto.raw_data();
     auto *tensor_data_buf = reinterpret_cast<uint8_t *>(tensor_info->Data());
     MS_EXCEPTION_IF_NULL(tensor_data_buf);
+    tensor_info->SetData(nullptr);
     auto ret = memcpy_s(tensor_data_buf, tensor_info->Size(), initial_data.data(), initial_data.size());
     if (EOK != ret) {
       MS_LOG(ERROR) << "memcpy_s error";
@@ -152,6 +153,7 @@ bool AnfImporterFromProtobuf::BuildParameterForFuncGraph(const ParameterPtr &nod
     param_value->set_tensor_type(tensor_info->data_type());
     param_value->set_tensor_shape(tensor_info->shape());
     node->set_default_param(param_value);
+    delete tensor_info;
   }
   anfnode_build_map_[value_proto.name()] = node;
   return true;
diff --git a/mindspore/lite/tools/converter/converter.cc b/mindspore/lite/tools/converter/converter.cc
index c45a7c469d..5d329f1977 100644
--- a/mindspore/lite/tools/converter/converter.cc
+++ b/mindspore/lite/tools/converter/converter.cc
@@ -58,7 +58,29 @@ class MindsporeImporter : public Converter {
 
   ~MindsporeImporter() override = default;
 };
-
+void Converter::FreeFuncGraph(const FuncGraphPtr &func_graph) {
+  MS_ASSERT(func_graph != nullptr);
+  auto cnodes = func_graph->GetOrderedCnodes();
+  for (auto &cnode : cnodes) {
+    auto primitiveT_value = GetValueNode<std::shared_ptr<PrimitiveC>>(cnode->input(0));
+    if (primitiveT_value == nullptr) {
+      MS_LOG(ERROR) << "PrimitiveT_value is nullptr";
+      return;
+    }
+    auto primT = primitiveT_value->GetPrimitiveT();
+    if (primT == nullptr) {
+      MS_LOG(ERROR) << "PrimitiveT is nullptr";
+      return;
+    }
+    if (primT->value.type == schema::PrimitiveType_TupleGetItem ||
+        primT->value.type == schema::PrimitiveType_MakeTuple ||
+        primT->value.type == schema::PrimitiveType_Return) {
+      delete primT;
+      primitiveT_value->SetPrimitiveT(nullptr);
+    }
+  }
+  return;
+}
 MetaGraphT *Converter::Convert(const converter::Flags *flag) {
   // parse the model and weight file to generate inference data structure
   FuncGraphPtr graph = nullptr;
@@ -116,6 +138,8 @@ MetaGraphT *Converter::Convert(const converter::Flags *flag) {
     MS_LOG(ERROR) << "FBTransform model failed " << status;
     return nullptr;
   }
+
+  FreeFuncGraph(graph);
   return meta_graph;
 }
 
@@ -171,6 +195,7 @@ int RunConverter(int argc, const char **argv) {
       auto onnx_graph = AnfImporterFromProtobuf::ReadOnnxFromBinary(flags->modelFile);
       MindsporeImporter mindsporeImporter(onnx_graph, graph);
       fb_graph = mindsporeImporter.Convert(flags.get());
+      delete onnx_graph;
       break;
     }
     case FmkType::FmkType_CAFFE: {
@@ -202,6 +227,8 @@ int RunConverter(int argc, const char **argv) {
     MS_LOG(ERROR) << "Save graph failed";
     return 1;
   }
+
+  delete fb_graph;
   MS_LOG(INFO) << "CONVERT RESULT: SUCCESS!";
 
   return 0;
diff --git a/mindspore/lite/tools/converter/converter.h b/mindspore/lite/tools/converter/converter.h
index f4f20e5640..1002946f70 100644
--- a/mindspore/lite/tools/converter/converter.h
+++ b/mindspore/lite/tools/converter/converter.h
@@ -35,6 +35,7 @@ class Converter {
   virtual ~Converter();
   virtual schema::MetaGraphT *Convert(const lite::converter::Flags *flags);
   void CreateQuantizer(FuncGraphPtr funcGraph, const converter::Flags *flags);
+  void FreeFuncGraph(const FuncGraphPtr &func_graph);
 
  protected:
   ModelParser *modelParser = nullptr;
diff --git a/mindspore/lite/tools/optimizer/fusion/constant_folding_fusion.cc b/mindspore/lite/tools/optimizer/fusion/constant_folding_fusion.cc
index 1906d4b4c4..babf93d3dc 100644
--- a/mindspore/lite/tools/optimizer/fusion/constant_folding_fusion.cc
+++ b/mindspore/lite/tools/optimizer/fusion/constant_folding_fusion.cc
@@ -52,6 +52,7 @@ const std::vector<Tensor *> GetCNodeInputTensors(const CNodePtr &CNode) {
     auto lite_tensor_size = tensorT->data.size() * sizeof(uint8_t);
     // when tensorT as graph input
     if (lite_tensor_size == 0) {
+      delete lite_tensor;
       return input_tensors;
     }
     auto tensor_data = new (std::nothrow) char[lite_tensor_size / sizeof(char)];
diff --git a/mindspore/lite/tools/optimizer/fusion/conv_transform_fusion.cc b/mindspore/lite/tools/optimizer/fusion/conv_transform_fusion.cc
index 05fc103689..db6ee61ad9 100644
--- a/mindspore/lite/tools/optimizer/fusion/conv_transform_fusion.cc
+++ b/mindspore/lite/tools/optimizer/fusion/conv_transform_fusion.cc
@@ -100,6 +100,14 @@ const AnfNodePtr ConvTransformFusion::Process(const FuncGraphPtr &func_graph, co
     MS_LOG(EXCEPTION) << "Unsupported opType, " << type;
   }
   pre_node->set_abstract(abstr);
+  const auto &prim = GetValueNode<std::shared_ptr<lite::PrimitiveC>>(transform_node->input(0));
+  if (prim != nullptr) {
+    auto *prim_t = prim->GetPrimitiveT();
+    if (prim_t != nullptr) {
+      delete prim_t;
+      prim->SetPrimitiveT(nullptr);
+    }
+  }
   return pre_node;
 }