diff --git a/examples/vision/detection/scaledyolov4/python/README.md b/examples/vision/detection/scaledyolov4/python/README.md
index 9c38e68c4..0f99e4dc0 100644
--- a/examples/vision/detection/scaledyolov4/python/README.md
+++ b/examples/vision/detection/scaledyolov4/python/README.md
@@ -81,4 +81,4 @@ ScaledYOLOv4模型加载和初始化，其中model_file为导出的ONNX模型格
 - [ScaledYOLOv4 模型介绍](..)
 - [ScaledYOLOv4 C++部署](../cpp)
 - [模型预测结果说明](../../../../../docs/api/vision_results/)
-- [如何切换模型推理后端引擎](../../../../how_to_change_backend.md)
+- [如何切换模型推理后端引擎](../../../../../docs/runtime/how_to_change_backend.md)