diff --git a/01.fit_a_line/README.cn.md b/01.fit_a_line/README.cn.md
index 87ab88516317c42a6a2d63c7ae033665dac07834..69f1aeeb431bc397056bc5b43c8bad67a3ea3df5 100644
--- a/01.fit_a_line/README.cn.md
+++ b/01.fit_a_line/README.cn.md
@@ -157,7 +157,7 @@ place = fluid.CUDAPlace(0) if use_cuda else fluid.CPUPlace()
 trainer = fluid.Trainer(
     train_func=train_program,
     place=place,
-    optimizer_func=fluid.optimizer.SGD(learning_rate=0.001))
+    optimizer_func=lambda : fluid.optimizer.SGD(learning_rate=0.001))
 ```
 
 ### 开始提供数据
diff --git a/01.fit_a_line/README.md b/01.fit_a_line/README.md
index df624f9d31c12ded1fac62e18b220c16659621c2..9d333addc548c930e16669b694a9e433bcfd2de8 100644
--- a/01.fit_a_line/README.md
+++ b/01.fit_a_line/README.md
@@ -165,7 +165,7 @@ The trainer will take the `train_program` as input.
 trainer = fluid.Trainer(
     train_func=train_program,
     place=place,
-    optimizer_func=fluid.optimizer.SGD(learning_rate=0.001))
+    optimizer_func=lambda : fluid.optimizer.SGD(learning_rate=0.001))
 ```
 
 ### Feeding Data