diff --git a/mindspore/lite/src/executor.h b/mindspore/lite/src/executor.h
index c1b073a8a0..d951ffb6e0 100644
--- a/mindspore/lite/src/executor.h
+++ b/mindspore/lite/src/executor.h
@@ -28,7 +28,7 @@ class Executor {
   Executor() = default;
   virtual ~Executor() = default;
 
-  virtual int Prepare(const std::vector<kernel::LiteKernel *> &kernels) { return 0; }
+  virtual int Prepare(const std::vector<kernel::LiteKernel *> &kernels) { return RET_OK; }
 
   virtual int Run(std::vector<Tensor *> &in_tensors, std::vector<Tensor *> &out_tensors,
                   std::vector<kernel::LiteKernel *> &kernels, Allocator *allocator = nullptr,
diff --git a/mindspore/lite/src/sub_graph_kernel.cc b/mindspore/lite/src/sub_graph_kernel.cc
index 33f36c0283..8b328e2965 100644
--- a/mindspore/lite/src/sub_graph_kernel.cc
+++ b/mindspore/lite/src/sub_graph_kernel.cc
@@ -63,7 +63,7 @@ int SubGraphKernel::Prepare() {
       return mindspore::lite::RET_NULL_PTR;
     }
     auto ret = node->Prepare();
-    if (ret == RET_OK) {
+    if (ret != RET_OK) {
       MS_LOG(ERROR) << "prepare node " << node->name() << " failed";
       return ret;
     }
@@ -180,6 +180,20 @@ int SubGraphKernel::ReSize(bool is_interrupt) {
   return RET_OK;
 }
 
+int CpuSubGraph::Prepare() {
+  auto ret = SubGraphKernel::Prepare();
+  if (ret != RET_OK) {
+    return ret;
+  }
+  for (auto node : nodes_) {
+    for (auto tensor : node->out_tensors()) {
+      MS_ASSERT(tensor != nullptr);
+      tensor->set_allocator(this->context_->allocator.get());
+    }
+  }
+  return RET_OK;
+}
+
 int CpuFp32SubGraph::PreProcess() { return RET_OK; }
 
 int CpuFp16SubGraph::PreProcess() {
diff --git a/mindspore/lite/src/sub_graph_kernel.h b/mindspore/lite/src/sub_graph_kernel.h
index 2d4607f2fe..077b8536e4 100644
--- a/mindspore/lite/src/sub_graph_kernel.h
+++ b/mindspore/lite/src/sub_graph_kernel.h
@@ -61,12 +61,34 @@ class SubGraphKernel : public LiteKernel {
   mindspore::lite::Executor *executor_ = nullptr;
 };
 
-class CpuFp32SubGraph : public SubGraphKernel {
+class CpuSubGraph : public SubGraphKernel {
+ public:
+  explicit CpuSubGraph(const std::vector<lite::Tensor *> &inputs, const std::vector<lite::Tensor *> &outputs,
+                       const std::vector<LiteKernel *> &in_kernels, const std::vector<LiteKernel *> &out_kernels,
+                       const std::vector<LiteKernel *> &nodes, const lite::InnerContext *ctx)
+      : SubGraphKernel(inputs, outputs, in_kernels, out_kernels, nodes, ctx) {
+    subgraph_type_ = kCpuFP32SubGraph;
+    this->executor_ = new mindspore::lite::Executor;
+  }
+
+  ~CpuSubGraph() override = default;
+
+  int Prepare() override;
+  int Init() override { return SubGraphKernel::Init(); }
+  int PreProcess() override { return SubGraphKernel::PreProcess(); }
+  int Run() override { return SubGraphKernel::Run(); }
+  int Run(const KernelCallBack &before, const KernelCallBack &after) override {
+    return SubGraphKernel::Run(before, after);
+  };
+  int PostProcess() override { return mindspore::lite::RET_OK; }
+};
+
+class CpuFp32SubGraph : public CpuSubGraph {
  public:
   explicit CpuFp32SubGraph(const std::vector<lite::Tensor *> &inputs, const std::vector<lite::Tensor *> &outputs,
                            const std::vector<LiteKernel *> &in_kernels, const std::vector<LiteKernel *> &out_kernels,
                            const std::vector<LiteKernel *> &nodes, const lite::InnerContext *ctx)
-      : SubGraphKernel(inputs, outputs, in_kernels, out_kernels, nodes, ctx) {
+      : CpuSubGraph(inputs, outputs, in_kernels, out_kernels, nodes, ctx) {
     subgraph_type_ = kCpuFP32SubGraph;
     this->name_ = "CpuFP32SubGraph";
     this->executor_ = new mindspore::lite::Executor;
@@ -82,12 +104,12 @@ class CpuFp32SubGraph : public SubGraphKernel {
   int PostProcess() override { return mindspore::lite::RET_OK; }
 };
 
-class CpuFp16SubGraph : public SubGraphKernel {
+class CpuFp16SubGraph : public CpuSubGraph {
  public:
   explicit CpuFp16SubGraph(const std::vector<lite::Tensor *> &inputs, const std::vector<lite::Tensor *> &outputs,
                            const std::vector<LiteKernel *> &in_kernels, const std::vector<LiteKernel *> &out_kernels,
                            const std::vector<LiteKernel *> &nodes, const lite::InnerContext *ctx)
-      : SubGraphKernel(inputs, outputs, in_kernels, out_kernels, nodes, ctx) {
+      : CpuSubGraph(inputs, outputs, in_kernels, out_kernels, nodes, ctx) {
     subgraph_type_ = kCpuFP16SubGraph;
     this->name_ = "CpuFP16SubGraph";
     this->executor_ = new mindspore::lite::Executor;
diff --git a/mindspore/lite/src/tensor.cc b/mindspore/lite/src/tensor.cc
index 892289f10f..65ed534007 100644
--- a/mindspore/lite/src/tensor.cc
+++ b/mindspore/lite/src/tensor.cc
@@ -285,6 +285,51 @@ std::string Tensor::ToString() const {
   return oss.str();
 }
 
+int Tensor::MallocData(mindspore::lite::Allocator *allocator) {
+  if (nullptr != this->data_) {
+    return 0;
+  }
+  if (allocator != nullptr) {
+    allocator_ = allocator;
+  }
+  if (allocator_ == nullptr) {
+    this->data_ = malloc(this->Size());
+  } else {
+    this->data_ = allocator_->Malloc(this->Size());
+  }
+  if (nullptr == this->data_) {
+    MS_LOG(ERROR) << "Malloc tensor data failed, size=" << this->Size();
+    return -1;
+  }
+
+  return 0;
+}
+
+int Tensor::FreeData() {
+  if (nullptr == this->data_) {
+    return 0;
+  }
+  if (nullptr == allocator_) {
+    free(this->data_);
+    this->data_ = nullptr;
+  } else {
+    allocator_->Free(this->data_);
+    this->data_ = nullptr;
+  }
+  return 0;
+}
+
+void *Tensor::MutableData() {
+  if (this->data_ == nullptr) {
+    auto ret = this->MallocData();
+    if (ret != 0) {
+      MS_LOG(WARNING) << "Malloc data failed";
+    }
+  }
+  Prepare();
+  return this->data_;
+}
+
 void Tensor::AddQuantParam(const QuantArg &quant_arg) { this->quant_params_.push_back(quant_arg); }
 
 std::vector<QuantArg> Tensor::GetQuantParams() const { return this->quant_params_; }
diff --git a/mindspore/lite/src/tensor.h b/mindspore/lite/src/tensor.h
index 97b2af97b2..7f219de192 100644
--- a/mindspore/lite/src/tensor.h
+++ b/mindspore/lite/src/tensor.h
@@ -147,50 +147,11 @@ class Tensor : public mindspore::tensor::MSTensor {
 
   void set_allocator(mindspore::lite::Allocator *allocator) { allocator_ = allocator; }
 
-  int MallocData(mindspore::lite::Allocator *allocator = nullptr) {
-    if (nullptr != this->data_) {
-      return 0;
-    }
-    if (allocator != nullptr) {
-      allocator_ = allocator;
-    }
-    if (allocator_ == nullptr) {
-      this->data_ = malloc(this->Size());
-    } else {
-      this->data_ = allocator_->Malloc(this->Size());
-    }
-    if (nullptr == this->data_) {
-      MS_LOG(ERROR) << "Malloc tensor data failed, size=" << this->Size();
-      return -1;
-    }
+  int MallocData(mindspore::lite::Allocator *allocator = nullptr);
 
-    return 0;
-  }
+  int FreeData();
 
-  int FreeData() {
-    if (nullptr == this->data_) {
-      return 0;
-    }
-    if (nullptr == allocator_) {
-      free(this->data_);
-      this->data_ = nullptr;
-    } else {
-      allocator_->Free(this->data_);
-      this->data_ = nullptr;
-    }
-    return 0;
-  }
-
-  void *MutableData() override {
-    if (this->data_ == nullptr) {
-      auto ret = this->MallocData();
-      if (ret != 0) {
-        MS_LOG(WARNING) << "Malloc data failed";
-      }
-    }
-    Prepare();
-    return this->data_;
-  }
+  void *MutableData() override;
 
   void *data_c() const { return data_; }