diff --git a/demo/mask_detection/python/README.md b/demo/mask_detection/python/README.md
index 5af3034c3cc5ce2a9d19f600131ebe22538f8801..a2dc51f4a77468aa63e2fd0d18410def69d6f46f 100644
--- a/demo/mask_detection/python/README.md
+++ b/demo/mask_detection/python/README.md
@@ -51,8 +51,8 @@ python infer.py --models_dir=/path/to/models --img_paths=/path/to/images --video
 | 参数 | 是否必须|含义 |
 |-------|-------|----------|
 | models_dir | Yes|两个模型路径./pyramidbox_lite_mobile_mask |
-| img_paths |No|需要预测的图片目录 |
-| video_path |No|需要预测的视频目录|
+| img_paths |img_paths/video_path 二选一|需要预测的图片目录 |
+| video_path |img_paths/video_path 二选一|需要预测的视频目录|
 | video_size |No|预测视频分辨率大小(w,h) |
 | use_camera |No|是否打开摄像头进行预测 |
 | use_gpu |No|是否GPU，默认为False|