diff --git a/mindinsight/datavisual/data_transform/histogram.py b/mindinsight/datavisual/data_transform/histogram.py
index 7f4bf9086d0c2197519dccd57e080d407a6c93d4..7bfff3ba73a7d57a277dffebe404121847af8a35 100644
--- a/mindinsight/datavisual/data_transform/histogram.py
+++ b/mindinsight/datavisual/data_transform/histogram.py
@@ -75,7 +75,10 @@ class Histogram:
     Histogram data class.
 
     Args:
-        buckets (tuple[Bucket])
+        buckets (tuple[Bucket]): The buckets of histogram data.
+        max_val (number): The max value of histogram data.
+        min_val (number): The min value of histogram data.
+        count (int): The count of histogram data.
     """
 
     # Max quantity of original buckets.