diff --git a/lite/api/benchmark.cc b/lite/api/benchmark.cc
index ee236c191850e2258ac0e6341c500c8a55bc639a..d53de7bf2ed00fed70bbd1f70729a051e5d7203b 100644
--- a/lite/api/benchmark.cc
+++ b/lite/api/benchmark.cc
@@ -29,22 +29,22 @@
 
 DEFINE_string(model_dir,
               "",
-              "the path of the model, set model_dir when the model is no "
-              "combined formate. This option will be ignored if model_file "
-              "and param_file are exist.");
-DEFINE_string(model_file,
+              "the path of the model, the model and param files is under "
+              "model_dir.");
+DEFINE_string(model_filename,
               "",
-              "the path of model file, set model_file when the model is "
-              "combined formate.");
-DEFINE_string(param_file,
+              "the filename of model file. When the model is combined formate, "
+              "please set model_file.");
+DEFINE_string(param_filename,
               "",
-              "the path of param file, set param_file when the model is "
+              "the filename of param file, set param_file when the model is "
               "combined formate.");
 DEFINE_string(input_shape,
               "1,3,224,224",
               "set input shapes according to the model, "
               "separated by colon and comma, "
-              "such as 1,3,244,244:1,3,300,300.");
+              "such as 1,3,244,244");
+DEFINE_string(input_img_path, "", "the path of input image");
 DEFINE_int32(warmup, 0, "warmup times");
 DEFINE_int32(repeats, 1, "repeats times");
 DEFINE_int32(power_mode,
@@ -77,12 +77,13 @@ inline double GetCurrentUS() {
   return 1e+6 * time.tv_sec + time.tv_usec;
 }
 
-void OutputOptModel(const std::string& save_optimized_model_dir,
-                    const std::vector<std::vector<int64_t>>& input_shapes) {
+void OutputOptModel(const std::string& save_optimized_model_dir) {
   lite_api::CxxConfig config;
   config.set_model_dir(FLAGS_model_dir);
-  config.set_model_file(FLAGS_model_file);
-  config.set_param_file(FLAGS_param_file);
+  if (!FLAGS_model_filename.empty() && !FLAGS_param_filename.empty()) {
+    config.set_model_file(FLAGS_model_dir + "/" + FLAGS_model_filename);
+    config.set_param_file(FLAGS_model_dir + "/" + FLAGS_param_filename);
+  }
   std::vector<Place> vaild_places = {
       Place{TARGET(kARM), PRECISION(kFloat)},
   };
@@ -106,7 +107,7 @@ void OutputOptModel(const std::string& save_optimized_model_dir,
 }
 
 #ifdef LITE_WITH_LIGHT_WEIGHT_FRAMEWORK
-void Run(const std::vector<std::vector<int64_t>>& input_shapes,
+void Run(const std::vector<int64_t>& input_shape,
          const std::string& model_dir,
          const std::string model_name) {
   // set config and create predictor
@@ -118,17 +119,27 @@ void Run(const std::vector<std::vector<int64_t>>& input_shapes,
   auto predictor = lite_api::CreatePaddlePredictor(config);
 
   // set input
-  for (int j = 0; j < input_shapes.size(); ++j) {
-    auto input_tensor = predictor->GetInput(j);
-    input_tensor->Resize(input_shapes[j]);
-    auto input_data = input_tensor->mutable_data<float>();
-    int input_num = 1;
-    for (size_t i = 0; i < input_shapes[j].size(); ++i) {
-      input_num *= input_shapes[j][i];
-    }
+  auto input_tensor = predictor->GetInput(0);
+  input_tensor->Resize(input_shape);
+  auto input_data = input_tensor->mutable_data<float>();
+  int input_num = 1;
+  for (size_t i = 0; i < input_shape.size(); ++i) {
+    input_num *= input_shape[i];
+  }
+  if (FLAGS_input_img_path.empty()) {
     for (int i = 0; i < input_num; ++i) {
       input_data[i] = 1.f;
     }
+  } else {
+    std::fstream fs(FLAGS_input_img_path);
+    if (!fs.is_open()) {
+      LOG(FATAL) << "open input image " << FLAGS_input_img_path << " error.";
+    }
+    for (int i = 0; i < input_num; i++) {
+      fs >> input_data[i];
+    }
+    // LOG(INFO) << "input data:" << input_data[0] << " " <<
+    // input_data[input_num-1];
   }
 
   // warmup
@@ -175,25 +186,12 @@ int main(int argc, char** argv) {
     exit(0);
   }
 
+  if (FLAGS_model_dir.back() == '/') {
+    FLAGS_model_dir.pop_back();
+  }
   std::size_t found = FLAGS_model_dir.find_last_of("/");
   std::string model_name = FLAGS_model_dir.substr(found + 1);
-  std::string save_optimized_model_dir = FLAGS_model_dir + "opt2";
-
-  auto split_string =
-      [](const std::string& str_in) -> std::vector<std::string> {
-    std::vector<std::string> str_out;
-    std::string tmp_str = str_in;
-    while (!tmp_str.empty()) {
-      size_t next_offset = tmp_str.find(":");
-      str_out.push_back(tmp_str.substr(0, next_offset));
-      if (next_offset == std::string::npos) {
-        break;
-      } else {
-        tmp_str = tmp_str.substr(next_offset + 1);
-      }
-    }
-    return str_out;
-  };
+  std::string save_optimized_model_dir = FLAGS_model_dir + "_opt2";
 
   auto get_shape = [](const std::string& str_shape) -> std::vector<int64_t> {
     std::vector<int64_t> shape;
@@ -211,22 +209,18 @@ int main(int argc, char** argv) {
     return shape;
   };
 
-  std::vector<std::string> str_input_shapes = split_string(FLAGS_input_shape);
-  std::vector<std::vector<int64_t>> input_shapes;
-  for (size_t i = 0; i < str_input_shapes.size(); ++i) {
-    input_shapes.push_back(get_shape(str_input_shapes[i]));
-  }
+  std::vector<int64_t> input_shape = get_shape(FLAGS_input_shape);
 
   // Output optimized model if needed
   if (FLAGS_run_model_optimize) {
-    paddle::lite_api::OutputOptModel(save_optimized_model_dir, input_shapes);
+    paddle::lite_api::OutputOptModel(save_optimized_model_dir);
   }
 
 #ifdef LITE_WITH_LIGHT_WEIGHT_FRAMEWORK
   // Run inference using optimized model
   std::string run_model_dir =
       FLAGS_run_model_optimize ? save_optimized_model_dir : FLAGS_model_dir;
-  paddle::lite_api::Run(input_shapes, run_model_dir, model_name);
+  paddle::lite_api::Run(input_shape, run_model_dir, model_name);
 #endif
   return 0;
 }