diff --git a/docs/demo_guides/cpp_demo.md b/docs/demo_guides/cpp_demo.md
index 5f3a2757b21cffb90ebd214ea6d9525dc3fb6dbd..7ce61244f9ba52a616cd6e73ba91c4c816ba7073 100644
--- a/docs/demo_guides/cpp_demo.md
+++ b/docs/demo_guides/cpp_demo.md
@@ -50,7 +50,7 @@ tar zxf mobilenet_v1.tar.gz
  
   ```shell
   python -m pip install paddlelite
-  paddle_opt_lite --model_dir=./mobilenet_v1 --optimize_out_type=naive_buffer   --optimize_out=./mobilenet_v1_opt
+  paddle_lite_opt --model_dir=./mobilenet_v1 --optimize_out_type=naive_buffer   --optimize_out=./mobilenet_v1_opt
   ```
 **结果如下图所示：**