diff --git a/docs/demo_guides/python_demo.md b/docs/demo_guides/python_demo.md
index 24ce217e57684791e5bce3cf8b1295faf7740c45..4370a6fbbfb95e68b131cc4bb1a7d51877938655 100644
--- a/docs/demo_guides/python_demo.md
+++ b/docs/demo_guides/python_demo.md
@@ -27,12 +27,19 @@ tar zxf mobilenet_v1.tar.gz
   - 非combined形式：模型文件夹model_dir下存在一个模型文件和多个参数文件时，传入模型文件夹路径，模型文件名默认为__model__。
 
   ```shell
-  paddle_lite_opt --model_dir=./mobilenet_v1  --valid_targets=mobilenet_v1_opt --valid_targets=x86
+  paddle_lite_opt --model_dir=./mobilenet_v1  \
+                  --optimize_out=mobilenet_v1_opt \
+                  --optimize_out_type=naive_buffer \
+                  --valid_targets=x86
   ```
   - combined形式：模型文件夹model_dir下只有一个模型文件__model__和一个参数文件__params__时，传入模型文件和参数文件路径
 
   ```shell
-  paddle_lite_opt --model_file=./mobilenet_v1/__model__ --param_file=./mobilenet_v1/__params__  --valid_targets=mobilenet_v1_opt --valid_targets=x86
+  paddle_lite_opt --model_file=./mobilenet_v1/__model__ \
+                  --param_file=./mobilenet_v1/__params__  \
+                  --optimize_out=mobilenet_v1_opt \
+                  --optimize_out_type=naive_buffer \
+                  --valid_targets=x86
   ```
 
 - windows环境
diff --git a/docs/demo_guides/x86.md b/docs/demo_guides/x86.md
index a8a4c117b69d401a7630edc231736e1bd74ba89f..d551daa8925e9eb2c0d0608830dab8795f5323c8 100644
--- a/docs/demo_guides/x86.md
+++ b/docs/demo_guides/x86.md
@@ -209,9 +209,9 @@ git checkout release/v2.6.0
 ```
 2、 源码编译(需要按照提示输入对应的参数)
 
-```bash
+```dos
 cd Paddle-Lite
-lite/tools/build_windows.bat 
+lite\tools\build_windows.bat 
 ```
 
 ### 编译结果说明
@@ -269,8 +269,8 @@ build.bat
 cd build 
 ```
 编译结果为当前目录下的 `Release\mobilenet_full_api.exe `
-``` bash
+``` dos
 # 2、执行预测
-Release\\mobilenet_full_api.exe mobilenet_v1
+Release\mobilenet_full_api.exe mobilenet_v1
 ```
 下载并解压模型[`mobilenet_v1`](http://paddle-inference-dist.bj.bcebos.com/mobilenet_v1.tar.gz)到`build`目录，执行以上命令进行预测。
diff --git a/lite/model_parser/model_parser.cc b/lite/model_parser/model_parser.cc
index 8bf3f87c613de261b5c4da9a1ab55c4378082864..77c7543d6be778e3763220f3d30a0c58ffc2fdde 100644
--- a/lite/model_parser/model_parser.cc
+++ b/lite/model_parser/model_parser.cc
@@ -323,7 +323,7 @@ void SaveCombinedParamsPb(const std::string &path,
   std::sort(paramlist.begin(), paramlist.end());
 
   // Load vars
-  std::ofstream file(path);
+  std::ofstream file(path, std::ios::binary);
   CHECK(file.is_open());
   for (size_t i = 0; i < paramlist.size(); ++i) {
     SerializeTensor(file, exec_scope, paramlist[i]);
diff --git a/lite/utils/io.h b/lite/utils/io.h
index 92405cae862f062090665aecc8eb7f207cf059e7..506901bad5f75c5c1564f6340c7f687537de2e68 100644
--- a/lite/utils/io.h
+++ b/lite/utils/io.h
@@ -38,10 +38,17 @@ static bool IsFileExists(const std::string& path) {
 // ARM mobile not support mkdir in C++
 static void MkDirRecur(const std::string& path) {
 #ifndef LITE_WITH_ARM
+
+#ifdef _WIN32
+  if (system(string_format("md %s", path.c_str()).c_str()) != 0) {
+    LOG(ERROR) << "Cann't mkdir " << path;
+  }
+#else
   if (system(string_format("mkdir -p %s", path.c_str()).c_str()) != 0) {
     LOG(ERROR) << "Cann't mkdir " << path;
   }
-#else  // On ARM
+#endif  // _WIN32
+#else   // On ARM
   CHECK_NE(mkdir(path.c_str(), S_IRWXU), -1) << "Cann't mkdir " << path;
 #endif
 }