diff --git a/mindspore/ccsrc/kernel/common_utils.cc b/mindspore/ccsrc/kernel/common_utils.cc
index ee3b192a5ac..a162186fd3c 100644
--- a/mindspore/ccsrc/kernel/common_utils.cc
+++ b/mindspore/ccsrc/kernel/common_utils.cc
@@ -1661,7 +1661,7 @@ std::pair<bool, size_t> MatchKernelAttr(const KernelAttr &kernel_attr,
     bool mis_match = false;
     for (size_t i = 0; i < input_num; ++i) {
       auto dtype = cur_kernel_attr.GetInputAttr(cur_kernel_attr.GetAllSame() ? 0 : i).dtype;
-      if (kernel_attr.GetInputAttr(i).dtype != dtype) {
+      if (kernel_attr.GetInputAttr(i).dtype != dtype && kernel_attr.GetInputAttr(i).dtype != kTypeUnknown) {
         mis_match = true;
         break;
       }
@@ -1672,7 +1672,7 @@ std::pair<bool, size_t> MatchKernelAttr(const KernelAttr &kernel_attr,
 
     for (size_t i = 0; i < output_num; ++i) {
       auto dtype = cur_kernel_attr.GetOutputAttr(cur_kernel_attr.GetAllSame() ? 0 : i).dtype;
-      if (kernel_attr.GetOutputAttr(i).dtype != dtype) {
+      if (kernel_attr.GetOutputAttr(i).dtype != dtype && kernel_attr.GetOutputAttr(i).dtype != kTypeUnknown) {
         mis_match = true;
         break;
       }
diff --git a/mindspore/ccsrc/kernel/kernel.cc b/mindspore/ccsrc/kernel/kernel.cc
index 2ec52e7b128..3ad4ab61d48 100644
--- a/mindspore/ccsrc/kernel/kernel.cc
+++ b/mindspore/ccsrc/kernel/kernel.cc
@@ -74,6 +74,9 @@ TypeId KernelTensor::GetDtype() const {
     if (info.base_->dynamic_len()) {
       return info.base_->dynamic_len_element_abs()->BuildType()->type_id();
     }
+    if (info.base_->elements().empty()) {
+      return TypeId::kTypeUnknown;
+    }
     return info.base_->elements()[0]->BuildType()->type_id();
   } else if (meta_type_ == kObjectTypeList) {
     // List
@@ -81,6 +84,9 @@ TypeId KernelTensor::GetDtype() const {
     if (info.base_->dynamic_len()) {
       return info.base_->dynamic_len_element_abs()->BuildType()->type_id();
     }
+    if (info.base_->elements().empty()) {
+      return TypeId::kTypeUnknown;
+    }
     return info.base_->elements()[0]->BuildType()->type_id();
   } else {
     // Tensor
diff --git a/mindspore/ccsrc/plugin/device/cpu/optimizer/insert_cast_cpu.cc b/mindspore/ccsrc/plugin/device/cpu/optimizer/insert_cast_cpu.cc
index 4d6e251fc1e..e2d9a974d7e 100644
--- a/mindspore/ccsrc/plugin/device/cpu/optimizer/insert_cast_cpu.cc
+++ b/mindspore/ccsrc/plugin/device/cpu/optimizer/insert_cast_cpu.cc
@@ -136,7 +136,8 @@ void InsertCast(const FuncGraphPtr &func_graph, const CNodePtr &cnode) {
     const std::string dev_fmt = AnfAlgo::GetInputFormat(cnode, input_index);
     const abstract::BaseShapePtr origin_shape =
       common::AnfAlgo::GetOutputDetailShape(prev_node.first, prev_node.second);
-    if (TypeId device_type = AnfAlgo::GetInputDeviceDataType(cnode, input_index); origin_type != device_type) {
+    TypeId device_type = AnfAlgo::GetInputDeviceDataType(cnode, input_index);
+    if (origin_type != device_type && origin_type != kTypeUnknown && device_type != kTypeUnknown) {
       auto cast = AddCastOpNodeToGraph(func_graph, cur_input, dev_fmt, origin_type, device_type, origin_shape);
       MS_EXCEPTION_IF_NULL(cast);
       cast->set_scope(cnode->scope());
diff --git a/mindspore/ccsrc/utils/anfalgo.cc b/mindspore/ccsrc/utils/anfalgo.cc
index db63453a44e..d385d648971 100644
--- a/mindspore/ccsrc/utils/anfalgo.cc
+++ b/mindspore/ccsrc/utils/anfalgo.cc
@@ -721,7 +721,7 @@ TypeId AnfAlgo::GetOutputInferDataType(const TypePtr &type, size_t output_idx) {
       return tuple_ptr->dynamic_element_type()->type_id();
     }
     if (tuple_ptr->size() == 0) {
-      return tuple_ptr->type_id();
+      return kTypeUnknown;
     }
     MS_EXCEPTION_IF_NULL(tuple_ptr);
     if (output_idx >= tuple_ptr->size()) {