diff --git a/dygraph/benchmark/deeplabv3p.yml b/dygraph/benchmark/deeplabv3p.yml
index a299bee30dbea80768d766e3473c6a7f6eb48254..bf9db712eb0015b009869ed76acaac6185fa879f 100644
--- a/dygraph/benchmark/deeplabv3p.yml
+++ b/dygraph/benchmark/deeplabv3p.yml
@@ -28,6 +28,7 @@ model:
   backbone:
     type: ResNet50_vd
     output_stride: 8
+    multi_grid: [1, 2, 4]
   num_classes: 19
   backbone_indices: [0, 3]
   aspp_ratios: [1, 12, 24, 36]
diff --git a/dygraph/paddleseg/core/val.py b/dygraph/paddleseg/core/val.py
index 936b257664380dbc0fbb8867a589b8461fd61335..ebc6e6695374a577a41f60524e0e85fa3a05bf0d 100644
--- a/dygraph/paddleseg/core/val.py
+++ b/dygraph/paddleseg/core/val.py
@@ -19,7 +19,7 @@ import tqdm
 import cv2
 import paddle
 import paddle.nn.functional as F
-from paddle import to_variable
+from paddle import to_tensor
 
 import paddleseg.utils.logger as logger
 from paddleseg.utils import ConfusionMatrix
@@ -47,7 +47,7 @@ def evaluate(model,
     timer.start()
     for iter, (im, im_info, label) in tqdm.tqdm(
             enumerate(eval_dataset), total=total_iters):
-        im = to_variable(im)
+        im = to_tensor(im)
         logits = model(im)
         pred = paddle.argmax(logits[0], axis=1)
         pred = pred.numpy().astype('float32')
diff --git a/dygraph/paddleseg/cvlibs/callbacks.py b/dygraph/paddleseg/cvlibs/callbacks.py
index e948344ae499f333e435fa41fbd8f458cb8b3e2e..13b6c1a1cb33c04b3689b01a6118b59e10d0f353 100644
--- a/dygraph/paddleseg/cvlibs/callbacks.py
+++ b/dygraph/paddleseg/cvlibs/callbacks.py
@@ -1,4 +1,3 @@
-# -*- encoding: utf-8 -*-
 # Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/dygraph/paddleseg/cvlibs/manager.py b/dygraph/paddleseg/cvlibs/manager.py
index 339070069c7e39532ec7fe2c826851a8d0f53df6..e6aace64213cebc275cbe831c5dfd6f6d372aa34 100644
--- a/dygraph/paddleseg/cvlibs/manager.py
+++ b/dygraph/paddleseg/cvlibs/manager.py
@@ -1,4 +1,3 @@
-# -*- encoding: utf-8 -*-
 # Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/dygraph/paddleseg/env.py b/dygraph/paddleseg/env.py
index 3bb0930a9cd50d8d2449909a506427420c614f2d..43f881508f9fa02b2c7a9a7aacda469ebee3303b 100644
--- a/dygraph/paddleseg/env.py
+++ b/dygraph/paddleseg/env.py
@@ -1,4 +1,3 @@
-# coding:utf-8
 # Copyright (c) 2020  PaddlePaddle Authors. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License"
diff --git a/dygraph/paddleseg/models/common/__init__.py b/dygraph/paddleseg/models/common/__init__.py
index 33b2611df67fbfe22604512c1f0d03c9012cb3b4..3024f08b4debee4f2ff459eae1e9680b62db63e9 100644
--- a/dygraph/paddleseg/models/common/__init__.py
+++ b/dygraph/paddleseg/models/common/__init__.py
@@ -1,4 +1,3 @@
-# -*- encoding: utf-8 -*-
 # Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,4 +14,4 @@
 
 from . import layer_libs
 from . import activation
-from . import pyramid_pool
\ No newline at end of file
+from . import pyramid_pool
diff --git a/dygraph/paddleseg/models/common/activation.py b/dygraph/paddleseg/models/common/activation.py
index 69af72e0ea96cd389e48511ff7f7d4bee8680a8a..f565fb07aa2901f5c6f39e65532bdee81af1ffd9 100644
--- a/dygraph/paddleseg/models/common/activation.py
+++ b/dygraph/paddleseg/models/common/activation.py
@@ -1,4 +1,3 @@
-# -*- encoding: utf-8 -*-
 # Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -28,8 +27,8 @@ class Activation(nn.Layer):
         >>> print(sigmoid)
         <class 'paddle.nn.layer.activation.Sigmoid'>
         >>> not_exit_one = Activation("not_exit_one")
-        KeyError: "not_exit_one does not exist in the current dict_keys(['elu', 'gelu', 'hardshrink', 
-        'tanh', 'hardtanh', 'prelu', 'relu', 'relu6', 'selu', 'leakyrelu', 'sigmoid', 'softmax', 
+        KeyError: "not_exit_one does not exist in the current dict_keys(['elu', 'gelu', 'hardshrink',
+        'tanh', 'hardtanh', 'prelu', 'relu', 'relu6', 'selu', 'leakyrelu', 'sigmoid', 'softmax',
         'softplus', 'softshrink', 'softsign', 'tanhshrink', 'logsigmoid', 'logsoftmax', 'hsigmoid'])"
 
     Args:
@@ -57,4 +56,4 @@ class Activation(nn.Layer):
         if self._act is not None:
             return self.act_func(x)
         else:
-            return x
\ No newline at end of file
+            return x
diff --git a/dygraph/paddleseg/models/common/layer_libs.py b/dygraph/paddleseg/models/common/layer_libs.py
index 0335cfacfd190f1d84a52e73feb05a316d7af4a2..d032a59cd031d23890f76bb30920d0541a8bc301 100644
--- a/dygraph/paddleseg/models/common/layer_libs.py
+++ b/dygraph/paddleseg/models/common/layer_libs.py
@@ -1,4 +1,3 @@
-# -*- encoding: utf-8 -*-
 # Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/dygraph/paddleseg/models/common/pyramid_pool.py b/dygraph/paddleseg/models/common/pyramid_pool.py
index d1c643382d8f4e2a02f3f158a2eea09d57c4adaf..07f73d5c96119115cba7ed8ea1b3a391a3d5f1dc 100644
--- a/dygraph/paddleseg/models/common/pyramid_pool.py
+++ b/dygraph/paddleseg/models/common/pyramid_pool.py
@@ -1,4 +1,3 @@
-# -*- encoding: utf-8 -*-
 # Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -87,7 +86,7 @@ class ASPPModule(nn.Layer):
             img_avg = self.global_avg_pool(x)
             img_avg = F.resize_bilinear(img_avg, out_shape=x.shape[2:])
             outputs.append(img_avg)
-            
+
         x = paddle.concat(outputs, axis=1)
         x = self.conv_bn_relu(x)
         x = self.dropout(x)