diff --git a/docs/demo_guides/python_demo.md b/docs/demo_guides/python_demo.md
index 4370a6fbbfb95e68b131cc4bb1a7d51877938655..d6a7b15bd9be638ef586e6b589e35eecbf1613c2 100644
--- a/docs/demo_guides/python_demo.md
+++ b/docs/demo_guides/python_demo.md
@@ -77,7 +77,7 @@ python demo 完整代码位于 [demo/python](https://github.com/PaddlePaddle/Pad
 from paddlelite.lite import *
 
 config = MobileConfig()
-config.set_model_dir(/YOU_MODEL_PATH/mobilenet_v1_opt.nb)
+config.set_model_from_file(/YOU_MODEL_PATH/mobilenet_v1_opt.nb)
 ```
 
 (2) 创建predictor