diff --git a/paddle/framework/backward.cc b/paddle/framework/backward.cc
index faf6e60cbd1bcda9864c12696b336998ea7606b7..4688da07d448e7bb242a12b4f2efffcc71e75dac 100644
--- a/paddle/framework/backward.cc
+++ b/paddle/framework/backward.cc
@@ -217,7 +217,7 @@ static std::unique_ptr<OperatorBase> BackwardRecursive(
         // If part of input gradient of that operator is not calculated, fill
         // zero variables to that input gradient.
         net->AppendOp(OpRegistry::CreateOp("fill_zeros_like", {{"X", {prefix}}},
-                                           {{"Y", {grad_input}}},
+                                           {{"Out", {grad_input}}},
                                            AttributeMap{}));
       }
       return false;
@@ -396,7 +396,7 @@ std::vector<std::unique_ptr<OpDescBind>> MakeOpGrad(
         desc->Rename(in_name, new_name);
         std::unique_ptr<OpDescBind> fill_zeros_op(
             new OpDescBind("fill_zeros_like", {{"X", {prefix}}},
-                           {{"Y", {new_name}}}, AttributeMap{}));
+                           {{"Out", {new_name}}}, AttributeMap{}));
         pending_fill_zeros_ops.push_back(std::move(fill_zeros_op));
       }
     }
diff --git a/paddle/framework/backward_test.cc b/paddle/framework/backward_test.cc
index 9fe49881d5b740655432f6e83a7886878ceb17e8..6063b4bfc1f7aff241e2b94cf10dd3771c9d6702 100644
--- a/paddle/framework/backward_test.cc
+++ b/paddle/framework/backward_test.cc
@@ -430,8 +430,8 @@ TEST(Backward, op_part_of_output_are_not_need) {
   ASSERT_EQ("fill_zeros_like", fill_zero.Type());
   ASSERT_EQ(1UL, fill_zero.Inputs("X").size());
   ASSERT_EQ("Z", fill_zero.Input("X"));
-  ASSERT_EQ(1UL, fill_zero.Outputs("Y").size());
-  ASSERT_EQ(std::string("Z") + f::kZeroVarSuffix, fill_zero.Output("Y"));
+  ASSERT_EQ(1UL, fill_zero.Outputs("Out").size());
+  ASSERT_EQ(std::string("Z") + f::kZeroVarSuffix, fill_zero.Output("Out"));
 
   auto &d_many_out = *net->ops_[1];
   ASSERT_EQ("many_output_op_grad", d_many_out.Type());
@@ -772,7 +772,7 @@ TEST(Backward, var_no_grad) {
   ASSERT_EQ(fill_zero_op->InputNames().size(), 1UL);
   ASSERT_EQ(fill_zero_op->OutputNames().size(), 1UL);
   EXPECT_EQ(fill_zero_op->Input("X"), std::vector<std::string>({"z1"}));
-  EXPECT_EQ(fill_zero_op->Output("Y"),
+  EXPECT_EQ(fill_zero_op->Output("Out"),
             std::vector<std::string>({std::string("z1") + f::kZeroVarSuffix}));
 
   f::OpDescBind *grad_op1 = block->AllOps()[5];
diff --git a/paddle/operators/fill_zeros_like_op.cc b/paddle/operators/fill_zeros_like_op.cc
index 720c11f5f12a8dea971fe82db6afe8f6b0d9ee1a..45f3788e1fb2e1e313096b371ca4eb9bcc6deb53 100644
--- a/paddle/operators/fill_zeros_like_op.cc
+++ b/paddle/operators/fill_zeros_like_op.cc
@@ -24,9 +24,9 @@ class FillZerosLikeOp : public framework::OperatorWithKernel {
   void InferShape(framework::InferShapeContext *ctx) const override {
     PADDLE_ENFORCE(ctx->HasInput("X"),
                    "Input(X) of FillZerosLikeOp should not be null.");
-    PADDLE_ENFORCE(ctx->HasOutput("Y"),
-                   "Output(Y) of FillZerosLikeOp should not be null.");
-    ctx->SetOutputDim("Y", ctx->GetInputDim("X"));
+    PADDLE_ENFORCE(ctx->HasOutput("Out"),
+                   "Output(Out) of FillZerosLikeOp should not be null.");
+    ctx->SetOutputDim("Out", ctx->GetInputDim("X"));
     ctx->ShareLoD("X", /*->*/ "Y");
   }
 };
@@ -37,7 +37,7 @@ class FillZerosLikeOpMaker : public framework::OpProtoAndCheckerMaker {
                        framework::OpAttrChecker *op_checker)
       : framework::OpProtoAndCheckerMaker(proto, op_checker) {
     AddInput("X", "The input of fill-zeros-like op.");
-    AddOutput("Y", "The variable will be filled up with zeros.");
+    AddOutput("Out", "The variable will be filled up with zeros.");
     AddComment(R"DOC(
 FillZerosLike Operator.
 
diff --git a/paddle/operators/fill_zeros_like_op.h b/paddle/operators/fill_zeros_like_op.h
index a6e2941f52150de7886717303d2cb2f10b7eef7b..351ecf8b2f1d945fabdd1d6c5ed56f76f3caae61 100644
--- a/paddle/operators/fill_zeros_like_op.h
+++ b/paddle/operators/fill_zeros_like_op.h
@@ -23,7 +23,7 @@ template <typename DeviceContext, typename T>
 class FillZerosLikeKernel : public framework::OpKernel<T> {
  public:
   void Compute(const framework::ExecutionContext& context) const override {
-    auto* out = context.Output<framework::Tensor>("Y");
+    auto* out = context.Output<framework::Tensor>("Out");
     out->mutable_data<T>(context.GetPlace());
 
     math::SetConstant<DeviceContext, T> setter;
diff --git a/python/paddle/v2/fluid/tests/test_fill_zeros_like_op.py b/python/paddle/v2/fluid/tests/test_fill_zeros_like_op.py
index eff8fa87d9c0dafc6935604101e94ee6c8b081ce..cd91769a22f8d6af193efabd8d997913676fbba6 100644
--- a/python/paddle/v2/fluid/tests/test_fill_zeros_like_op.py
+++ b/python/paddle/v2/fluid/tests/test_fill_zeros_like_op.py
@@ -7,7 +7,7 @@ class TestFillZerosLikeOp(OpTest):
     def setUp(self):
         self.op_type = "fill_zeros_like"
         self.inputs = {'X': np.random.random((219, 232)).astype("float32")}
-        self.outputs = {'Y': np.zeros_like(self.inputs["X"])}
+        self.outputs = {'Out': np.zeros_like(self.inputs["X"])}
 
     def test_check_output(self):
         self.check_output()