diff --git a/mindspore/ccsrc/cxx_api/model/model.cc b/mindspore/ccsrc/cxx_api/model/model.cc
index 88f19136886..79e1200cbba 100644
--- a/mindspore/ccsrc/cxx_api/model/model.cc
+++ b/mindspore/ccsrc/cxx_api/model/model.cc
@@ -129,6 +129,10 @@ MSTensor Model::GetOutputByTensorName(const std::vector<char> &tensor_name) {
   return MSTensor(nullptr);
 }
 
+std::vector<MSTensor> Model::GetOutputsByNodeName(const std::vector<char> &node_name) {
+  return std::vector<MSTensor>{GetOutputByTensorName(node_name)};
+}
+
 Model::Model() : impl_(nullptr) {}
 Model::~Model() {}
 
diff --git a/mindspore/ccsrc/cxx_api/serialization.cc b/mindspore/ccsrc/cxx_api/serialization.cc
index 381bbbceeb7..8c014263087 100644
--- a/mindspore/ccsrc/cxx_api/serialization.cc
+++ b/mindspore/ccsrc/cxx_api/serialization.cc
@@ -22,13 +22,8 @@
 #include "utils/crypto.h"
 
 namespace mindspore {
-static Buffer ReadFile(const std::string &file) {
-  Buffer buffer;
-  if (file.empty()) {
-    MS_LOG(ERROR) << "Pointer file is nullptr";
-    return buffer;
-  }
-
+static Status RealPath(const std::string &file, std::string *realpath_str) {
+  MS_EXCEPTION_IF_NULL(realpath_str);
   char real_path_mem[PATH_MAX] = {0};
   char *real_path_ret = nullptr;
 #if defined(_WIN32) || defined(_WIN64)
@@ -37,19 +32,34 @@ static Buffer ReadFile(const std::string &file) {
   real_path_ret = realpath(common::SafeCStr(file), real_path_mem);
 #endif
   if (real_path_ret == nullptr) {
-    MS_LOG(ERROR) << "File: " << file << " is not exist.";
+    return Status(kMEInvalidInput, "File: " + file + " does not exist.");
+  }
+  *realpath_str = real_path_mem;
+  return kSuccess;
+}
+
+static Buffer ReadFile(const std::string &file) {
+  Buffer buffer;
+  if (file.empty()) {
+    MS_LOG(ERROR) << "Pointer file is nullptr";
+    return buffer;
+  }
+
+  std::string real_path;
+  auto status = RealPath(file, &real_path);
+  if (status != kSuccess) {
+    MS_LOG(ERROR) << status.GetErrDescription();
     return buffer;
   }
 
-  std::string real_path(real_path_mem);
   std::ifstream ifs(real_path);
   if (!ifs.good()) {
-    MS_LOG(ERROR) << "File: " << real_path << " is not exist";
+    MS_LOG(ERROR) << "File: " << real_path << " does not exist";
     return buffer;
   }
 
   if (!ifs.is_open()) {
-    MS_LOG(ERROR) << "File: " << real_path << "open failed";
+    MS_LOG(ERROR) << "File: " << real_path << " open failed";
     return buffer;
   }
 
@@ -139,7 +149,13 @@ Status Serialization::Load(const std::vector<char> &file, ModelType model_type,
     return Status(kMEInvalidInput, err_msg.str());
   }
 
-  std::string file_path = CharToString(file);
+  std::string file_path;
+  auto status = RealPath(CharToString(file), &file_path);
+  if (status != kSuccess) {
+    MS_LOG(ERROR) << status.GetErrDescription();
+    return status;
+  }
+
   if (model_type == kMindIR) {
     FuncGraphPtr anf_graph;
     if (dec_key.len > dec_key.max_key_len) {
@@ -193,7 +209,17 @@ Status Serialization::Load(const std::vector<std::vector<char>> &files, ModelTyp
     return ret;
   }
 
-  std::vector<std::string> files_path = VectorCharToString(files);
+  std::vector<std::string> files_path;
+  for (const auto &file : files) {
+    std::string file_path;
+    auto status = RealPath(CharToString(file), &file_path);
+    if (status != kSuccess) {
+      MS_LOG(ERROR) << status.GetErrDescription();
+      return status;
+    }
+    files_path.emplace_back(std::move(file_path));
+  }
+
   if (model_type == kMindIR) {
     if (dec_key.len > dec_key.max_key_len) {
       err_msg << "The key length exceeds maximum length: " << dec_key.max_key_len;
diff --git a/tests/ut/cpp/cxx_api/serialization_test.cc b/tests/ut/cpp/cxx_api/serialization_test.cc
new file mode 100644
index 00000000000..61cbad279b2
--- /dev/null
+++ b/tests/ut/cpp/cxx_api/serialization_test.cc
@@ -0,0 +1,115 @@
+/**
+ * Copyright 2021 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include <memory>
+#include "common/common_test.h"
+#include "include/api/serialization.h"
+
+namespace mindspore {
+class TestCxxApiSerialization : public UT::Common {
+ public:
+  TestCxxApiSerialization() = default;
+};
+
+TEST_F(TestCxxApiSerialization, test_load_no_encrpty_mindir_SUCCESS) {
+  Graph graph;
+  ASSERT_TRUE(Serialization::Load("./data/mindir/add_no_encrpty.mindir", ModelType::kMindIR, &graph) == kSuccess);
+}
+
+TEST_F(TestCxxApiSerialization, test_load_output_args_nullptr_FAILED) {
+  auto status = Serialization::Load("./data/mindir/add_no_encrpty.mindir", ModelType::kMindIR, nullptr);
+  ASSERT_TRUE(status != kSuccess);
+  auto err_mst = status.GetErrDescription();
+  ASSERT_TRUE(err_mst.find("null") != std::string::npos);
+}
+
+TEST_F(TestCxxApiSerialization, test_load_file_not_exist_FAILED) {
+  Graph graph;
+  auto status = Serialization::Load("./data/mindir/file_not_exist.mindir", ModelType::kMindIR, &graph);
+  ASSERT_TRUE(status != kSuccess);
+  auto err_mst = status.GetErrDescription();
+  ASSERT_TRUE(err_mst.find("exist") != std::string::npos);
+}
+
+TEST_F(TestCxxApiSerialization, test_load_encrpty_mindir_SUCCESS) {
+  Graph graph;
+  std::string key_str = "0123456789ABCDEF";
+  Key key;
+  memcpy(key.key, key_str.c_str(), key_str.size());
+  key.len = key_str.size();
+  ASSERT_TRUE(Serialization::Load("./data/mindir/add_encrpty_key_0123456789ABCDEF.mindir", ModelType::kMindIR, &graph,
+                                  key, "AES-GCM") == kSuccess);
+}
+
+TEST_F(TestCxxApiSerialization, test_load_encrpty_mindir_without_key_FAILED) {
+  Graph graph;
+  auto status =
+    Serialization::Load("./data/mindir/add_encrpty_key_0123456789ABCDEF.mindir", ModelType::kMindIR, &graph);
+  ASSERT_TRUE(status != kSuccess);
+  auto err_mst = status.GetErrDescription();
+  ASSERT_TRUE(err_mst.find("be encrypted") != std::string::npos);
+}
+
+TEST_F(TestCxxApiSerialization, test_load_encrpty_mindir_with_wrong_key_FAILED) {
+  Graph graph;
+  std::string key_str = "WRONG_KEY";
+  Key key;
+  memcpy(key.key, key_str.c_str(), key_str.size());
+  key.len = key_str.size();
+  auto status = Serialization::Load("./data/mindir/add_encrpty_key_0123456789ABCDEF.mindir", ModelType::kMindIR, &graph,
+                                    key, "AES-GCM");
+  ASSERT_TRUE(status != kSuccess);
+}
+
+TEST_F(TestCxxApiSerialization, test_load_no_encrpty_mindir_with_wrong_key_FAILED) {
+  Graph graph;
+  std::string key_str = "WRONG_KEY";
+  Key key;
+  memcpy(key.key, key_str.c_str(), key_str.size());
+  key.len = key_str.size();
+  auto status = Serialization::Load("./data/mindir/add_no_encrpty.mindir", ModelType::kMindIR, &graph, key, "AES-GCM");
+  ASSERT_TRUE(status != kSuccess);
+}
+
+TEST_F(TestCxxApiSerialization, test_load_no_encrpty_mindir_x1_SUCCESS) {
+  std::vector<Graph> graphs;
+  ASSERT_TRUE(Serialization::Load(std::vector<std::string>(1, "./data/mindir/add_no_encrpty.mindir"),
+                                  ModelType::kMindIR, &graphs) == kSuccess);
+}
+
+TEST_F(TestCxxApiSerialization, test_load_no_encrpty_mindir_x2_SUCCESS) {
+  std::vector<Graph> graphs;
+  ASSERT_TRUE(Serialization::Load(std::vector<std::string>(2, "./data/mindir/add_no_encrpty.mindir"),
+                                  ModelType::kMindIR, &graphs) == kSuccess);
+}
+
+TEST_F(TestCxxApiSerialization, test_load_file_not_exist_x2_FAILED) {
+  std::vector<Graph> graphs;
+  auto status = Serialization::Load(std::vector<std::string>(2, "./data/mindir/file_not_exist.mindir"),
+                                    ModelType::kMindIR, &graphs);
+  ASSERT_TRUE(status != kSuccess);
+  auto err_mst = status.GetErrDescription();
+  ASSERT_TRUE(err_mst.find("exist") != std::string::npos);
+}
+
+TEST_F(TestCxxApiSerialization, test_load_encrpty_mindir_without_key_x2_FAILED) {
+  std::vector<Graph> graphs;
+  auto status = Serialization::Load(
+    std::vector<std::string>(2, "./data/mindir/add_encrpty_key_0123456789ABCDEF.mindir"), ModelType::kMindIR, &graphs);
+  ASSERT_TRUE(status != kSuccess);
+  auto err_mst = status.GetErrDescription();
+  ASSERT_TRUE(err_mst.find("be encrypted") != std::string::npos);
+}
+}  // namespace mindspore
diff --git a/tests/ut/data/mindir/add_encrpty_key_0123456789ABCDEF.mindir b/tests/ut/data/mindir/add_encrpty_key_0123456789ABCDEF.mindir
new file mode 100644
index 00000000000..cb5530033e1
Binary files /dev/null and b/tests/ut/data/mindir/add_encrpty_key_0123456789ABCDEF.mindir differ
diff --git a/tests/ut/data/mindir/add_no_encrpty.mindir b/tests/ut/data/mindir/add_no_encrpty.mindir
new file mode 100644
index 00000000000..c977119116c
Binary files /dev/null and b/tests/ut/data/mindir/add_no_encrpty.mindir differ