diff --git a/python/paddle/tensor/stat.py b/python/paddle/tensor/stat.py
index 61a3fbffd72e3e533f12dc022a4e4bbb597a5d0e..e23f28aa76b1b365fe496dfcc54338f40b05500c 100644
--- a/python/paddle/tensor/stat.py
+++ b/python/paddle/tensor/stat.py
@@ -158,6 +158,7 @@ def var(x, axis=None, unbiased=True, keepdim=False, name=None):
     if unbiased:
         one_const = paddle.ones([], x.dtype)
         n = where(n > one_const, n - 1.0, one_const)
+    n.stop_gradient = True
     out /= n
     return out