diff --git a/ppdet/data/transform/operators.py b/ppdet/data/transform/operators.py
index 8227b1db8e2489f296b299e9a609a2d251fc52e5..ba08c351e8b4f657dfe3f3173644ac1f785c7c38 100644
--- a/ppdet/data/transform/operators.py
+++ b/ppdet/data/transform/operators.py
@@ -2202,7 +2202,7 @@ class AugmentHSV(BaseOperator):
         else:
             cv2.cvtColor(img_hsv, cv2.COLOR_HSV2RGB, dst=img)
 
-        sample['image'] = img
+        sample['image'] = img.astype(np.float32)
         return sample