diff --git a/mindspore/lite/tools/converter/anf_transform.cc b/mindspore/lite/tools/converter/anf_transform.cc
index 87f9b3b541359071b14189126e6b5e30401aabda..60e7f16c90974e7ab363301f9a63de2d67f11a9b 100644
--- a/mindspore/lite/tools/converter/anf_transform.cc
+++ b/mindspore/lite/tools/converter/anf_transform.cc
@@ -36,7 +36,7 @@ void AnfTransform::SetGraphDef(schema::MetaGraphT *_dstDef) { graphDefT = _dstDe
 FuncGraphPtr AnfTransform::Transform(const FuncGraphPtr &old_graph) {
   // return old_graph;
   auto optimizer = std::make_shared<opt::GraphOptimizer>();
-  auto pm = std::make_shared<opt::PassManager>();
+  auto pm = std::make_shared<opt::PassManager>("anf fusion pass manager", false);
   pm->AddPass(std::make_shared<opt::ConvBiasaddFusion>());
   pm->AddPass(std::make_shared<opt::ConvBatchNormFusion>());
   pm->AddPass(std::make_shared<opt::ConvScaleFusion>());
diff --git a/mindspore/lite/tools/optimizer/common/gllo_utils.cc b/mindspore/lite/tools/optimizer/common/gllo_utils.cc
index f665f63ee059aebf8074bae3bd4f365de6d636d7..6f554652be3d38c22b70f0a536032d648e545fed 100644
--- a/mindspore/lite/tools/optimizer/common/gllo_utils.cc
+++ b/mindspore/lite/tools/optimizer/common/gllo_utils.cc
@@ -327,7 +327,15 @@ schema::PrimitiveType GetCNodeType(const BaseRef &n) {
 }
 
 bool IsParamNode(const BaseRef &n) {
-  return utils::isa<ParameterPtr>(n);
+  if (!utils::isa<ParameterPtr>(n)) {
+    return false;
+  }
+  auto param = utils::cast<ParameterPtr>(n)->default_param();
+  auto tensor = std::dynamic_pointer_cast<ParamValueLite>(param);
+  if (tensor == nullptr) {
+    return false;
+  }
+  return tensor->tensor_addr() != nullptr;
 }
 
 bool IsConvNode(const BaseRef &n) {
diff --git a/mindspore/lite/tools/optimizer/common/pass_manager_extends.cc b/mindspore/lite/tools/optimizer/common/pass_manager_extends.cc
index 5907700b6d9b919c6dc58be7cb613e7925605031..c4376190424616b66fc391a5e85e52a1cf083c56 100644
--- a/mindspore/lite/tools/optimizer/common/pass_manager_extends.cc
+++ b/mindspore/lite/tools/optimizer/common/pass_manager_extends.cc
@@ -28,6 +28,8 @@
 
 namespace mindspore {
 namespace opt {
+static size_t count = 0;
+constexpr size_t kMaxRepassTimes = 9;
 const std::vector<PassPtr> &PassManager::Passes() const { return passes_; }
 
 void PassManager::AddPass(const PassPtr &pass) {
@@ -79,9 +81,11 @@ bool PassManager::Run(const FuncGraphPtr &func_graph) const {
   while (change) {
     change = Run(func_graph, passes_);
     changed = change || changed;
-    if (run_only_once_) {
+    if (run_only_once_ || count > kMaxRepassTimes) {
       break;
     }
+    count++;
+    MS_LOG(INFO) << "Run pass counts:" << count;
   }
   return changed;
 }
diff --git a/mindspore/lite/tools/optimizer/fusion/constant_folding_fusion.cc b/mindspore/lite/tools/optimizer/fusion/constant_folding_fusion.cc
index b1d2e03b89de08ea33229cab5b83f0471a75f6a2..51f4de1cd2c8cde2bf6d54cffefa10c17ecdcc16 100644
--- a/mindspore/lite/tools/optimizer/fusion/constant_folding_fusion.cc
+++ b/mindspore/lite/tools/optimizer/fusion/constant_folding_fusion.cc
@@ -45,12 +45,20 @@ const std::vector<Tensor *> GetCNodeInputTensors(const CNodePtr &CNode) {
     auto tensor_shape = tensorT->dims;
     auto lite_tensor =
         new(std::nothrow)Tensor(TypeId(tensorT->dataType), tensor_shape, tensorT->format, tensorT->nodeType);
+    if (lite_tensor == nullptr) {
+      MS_LOG(ERROR) << "lite tensor is nullptr";
+      return input_tensors;
+    }
     auto lite_tensor_size = tensorT->data.size() * sizeof(uint8_t);
     // when tensorT as graph input
     if (lite_tensor_size == 0) {
         return input_tensors;
     }
     auto tensor_data = new(std::nothrow)char[lite_tensor_size / sizeof(char)];
+    if (tensor_data == nullptr) {
+      MS_LOG(ERROR) << "tensor_data is nullptr";
+      return input_tensors;
+    }
     auto ret = memcpy_s(tensor_data, lite_tensor_size, tensorT->data.data(), lite_tensor_size);
     if (ret != EOK) {
       MS_LOG(EXCEPTION) << "memcpy error: " << ret;
@@ -97,6 +105,10 @@ const ParameterPtr CreateNewParamter(const FuncGraphPtr &func_graph, Tensor *ten
   if (tensor->Data() != nullptr) {
     auto size = tensor->ElementsNum();
     auto tensor_data = new (std::nothrow) float[size];
+    if (tensor_data == nullptr) {
+      MS_LOG(ERROR) << "tensor_data is nullptr";
+      return nullptr;
+    }
     auto ret = memcpy_s(tensor_data, size * sizeof(float), tensor->Data(), size * sizeof(float));
     if (ret != EOK) {
       MS_LOG(EXCEPTION) << "memcpy error: " << ret;
@@ -150,11 +162,15 @@ const AnfNodePtr ConstFoldPass::Process(const FuncGraphPtr &func_graph, const An
       std::vector<Tensor *> output_tensors{output_nums, new Tensor()};
       auto scheam_primitive = PackPrimitiveT(input_cnode);
       auto lite_primitive = lite::Primitive::CreatePrimitive(scheam_primitive);
+      if (lite_primitive == nullptr) {
+        MS_LOG(DEBUG) << "constant_folding schedule node lite primitive nullptr";
+        return nullptr;
+      }
       lite_primitive->InferShape(input_tensors, output_tensors);
       auto lite_kernel = GetLiteKernel(input_tensors, output_tensors, lite_primitive);
       if (lite_kernel == nullptr) {
-        MS_LOG(ERROR) << "constant_folding schedule node lite kernel nullptr";
-        return any_node;
+        MS_LOG(DEBUG) << "constant_folding schedule node lite kernel nullptr";
+        return nullptr;
       }
       auto ret = lite_kernel->Run();
       if (0 != ret) {
diff --git a/mindspore/lite/tools/optimizer/fusion/conv_biasadd_fusion.cc b/mindspore/lite/tools/optimizer/fusion/conv_biasadd_fusion.cc
index e3e8bc272893333cb0bc5528434a2dce6b008982..be9d03d250a563ad80a438125a72e1c16cb2d39c 100644
--- a/mindspore/lite/tools/optimizer/fusion/conv_biasadd_fusion.cc
+++ b/mindspore/lite/tools/optimizer/fusion/conv_biasadd_fusion.cc
@@ -83,7 +83,11 @@ void GenConvNewBias(const FuncGraphPtr &func_graph, const CNodePtr &conv_node, c
   if (kernel_nums <= 0) {
     MS_LOG(EXCEPTION) << "kernel num less than 0";
   }
-  auto add_bias_data = new (std::nothrow) float[kernel_nums];
+  auto add_bias_data = new(std::nothrow) float[kernel_nums];
+  if (add_bias_data == nullptr) {
+    MS_LOG(ERROR) << "tensor_data is nullptr";
+    return;
+  }
   auto bias_add_weight = bias_node->input(kAddWEIGHTINDEX);
   CheckIfNodeIsParam(bias_add_weight);
   auto add_weight_param = bias_add_weight->cast<ParameterPtr>()->default_param();
@@ -140,7 +144,7 @@ const AnfNodePtr ConvBiasaddFusion::Process(const FuncGraphPtr &func_graph, cons
   AnfNodePtr conv_node_anf = add_node->input(1);
   CheckIfAnfNodeIsNull(conv_node_anf);
   if (IsMultiOutputTensors(func_graph, conv_node_anf)) {
-    return add_node;
+    return nullptr;
   }
   auto conv_node = conv_node_anf->cast<CNodePtr>();
   CheckIfCNodeIsNull(conv_node);
diff --git a/mindspore/lite/tools/optimizer/fusion/conv_transform_fusion.cc b/mindspore/lite/tools/optimizer/fusion/conv_transform_fusion.cc
index 5f9f51201058b1efdbbd736f378a04f1882102e6..0ac962b3a561ad6fcfb0fa768eb1179368777a4a 100644
--- a/mindspore/lite/tools/optimizer/fusion/conv_transform_fusion.cc
+++ b/mindspore/lite/tools/optimizer/fusion/conv_transform_fusion.cc
@@ -67,7 +67,7 @@ const AnfNodePtr ConvTransformFusion::Process(const FuncGraphPtr &func_graph, co
   auto pre_node = transform_node->input(1);
   auto conv_node = pre_node->cast<CNodePtr>();
   if (IsMultiOutputTensors(func_graph, conv_node)) {
-    return transform_node;
+    return nullptr;
   }
 
   auto abstr = transform_node->abstract();
@@ -76,8 +76,16 @@ const AnfNodePtr ConvTransformFusion::Process(const FuncGraphPtr &func_graph, co
     MS_LOG(ERROR) << "Unsupported conv node, " << conv_node->DebugString();
     return node;
   }
-  auto trans_scale = new (std::nothrow) float[kernel_nums];
-  auto trans_bias = new (std::nothrow) float[kernel_nums];
+  auto trans_scale = new(std::nothrow) float[kernel_nums];
+  if (trans_scale == nullptr) {
+    MS_LOG(ERROR) << "tensor_data is nullptr";
+    return nullptr;
+  }
+  auto trans_bias = new(std::nothrow) float[kernel_nums];
+  if (trans_bias == nullptr) {
+    MS_LOG(ERROR) << "tensor_data is nullptr";
+    return nullptr;
+  }
   GenTransParam(transform_node, kernel_nums, trans_scale, trans_bias);
   GenNewConvTensor(func_graph, conv_node, kernel_nums, trans_scale, trans_bias);
   delete[] trans_bias;
@@ -155,7 +163,11 @@ const void ConvTransformFusion::GenNewConvTensor(const FuncGraphPtr &func_graph,
     bias_data = reinterpret_cast<float *>(bias_tensor->tensor_addr());
     bias_flag = true;
   } else {
-    bias_data = new (std::nothrow) float[kernel_num];
+    bias_data = new(std::nothrow) float[kernel_num];
+    if (trans_scale == nullptr) {
+      MS_LOG(ERROR) << "tensor_data is nullptr";
+      return;
+    }
   }
   CalNewBiasTensor(bias_data, kernel_num, bias_flag, trans_scale, trans_bias);
   if (!bias_flag) {
@@ -193,7 +205,11 @@ const void ConvTransformFusion::CalNewBiasTensor(float *bias_data, int kernel_nu
                                                  const float *trans_scale, const float *trans_bias) const {
   MS_ASSERT(bias_data != nullptr);
   if (bias_flag) {
-    auto tmp_bias_data = new (std::nothrow) float[kernel_num];
+    auto tmp_bias_data = new(std::nothrow) float[kernel_num];
+    if (tmp_bias_data == nullptr) {
+      MS_LOG(ERROR) << "tensor_data is nullptr";
+      return;
+    }
     if (EOK != memset_s(tmp_bias_data, kernel_num * sizeof(float), 0, kernel_num * sizeof(float))) {
       MS_LOG(EXCEPTION) << "memset bias data failed";
     }