diff --git a/python/paddle/tensor/stat.py b/python/paddle/tensor/stat.py
index 6c4fd2c2a4b4689ac0c2d5ed289bca605f3797ef..9bde154bfe08f1df2adbacd077d074e3c52e7db0 100644
--- a/python/paddle/tensor/stat.py
+++ b/python/paddle/tensor/stat.py
@@ -182,6 +182,7 @@ def var(x, axis=None, unbiased=True, keepdim=False, name=None):
     if unbiased:
         one_const = paddle.ones([1], x.dtype)
         n = where(n > one_const, n - 1.0, one_const)
+    n.stop_gradient = True
     out /= n
     return out