diff --git a/doc/fluid/user_guides/howto/dygraph/DyGraph.md b/doc/fluid/user_guides/howto/dygraph/DyGraph.md
index 5bffcf6cf8c21e98c02e73d055648d9a211076c0..71873a625184406eaf7665bac3bdf00add693f3b 100644
--- a/doc/fluid/user_guides/howto/dygraph/DyGraph.md
+++ b/doc/fluid/user_guides/howto/dygraph/DyGraph.md
@@ -39,11 +39,11 @@ Dygraph将非常适合和Numpy一起使用，使用`fluid.dygraph.to_variable(x)
 		
 		x = np.ones([2, 2], np.float32)
 		with fluid.dygraph.guard():
-		        inputs = []
-		        for _ in range(10):
+		      inputs = []
+		      for _ in range(10):
 		            inputs.append(fluid.dygraph.to_variable(x))
-		        ret = fluid.layers.sums(inputs)
-		        print(ret.numpy())
+		      ret = fluid.layers.sums(inputs)
+		      print(ret.numpy())
 				
 		                        
 		[[10. 10.]