diff --git a/ppdet/data/transform/operators.py b/ppdet/data/transform/operators.py
index 01af29ffc4f481e4e044979542ca1d4387c56374..c88ca89695df42c9b50b28e55473a70ba37d1241 100644
--- a/ppdet/data/transform/operators.py
+++ b/ppdet/data/transform/operators.py
@@ -457,6 +457,10 @@ class GridMask(BaseOperator):
 @register_op
 class RandomDistort(BaseOperator):
     """Random color distortion.
+    Note:
+        The 'probability' in [lower, upper, probability] is the probability of not using this transformation,
+        not the probability of using this transformation. And this only applies in this operator(RandomDistort),
+        'probability' in other BaseOperator means the probability of using that transformation.
     Args:
         hue (list): hue settings. in [lower, upper, probability] format.
         saturation (list): saturation settings. in [lower, upper, probability] format.