diff --git a/tools/style_text_rec/arch/base_module.py b/tools/style_text_rec/arch/base_module.py
index ea203f82..da2b6b83 100644
--- a/tools/style_text_rec/arch/base_module.py
+++ b/tools/style_text_rec/arch/base_module.py
@@ -11,9 +11,9 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-import functools
 import paddle
 import paddle.nn as nn
+
 from arch.spectral_norm import spectral_norm
 
 
diff --git a/tools/style_text_rec/arch/decoder.py b/tools/style_text_rec/arch/decoder.py
index fe8c599c..36f07c59 100644
--- a/tools/style_text_rec/arch/decoder.py
+++ b/tools/style_text_rec/arch/decoder.py
@@ -13,6 +13,7 @@
 # limitations under the License.
 import paddle
 import paddle.nn as nn
+
 from arch.base_module import SNConv, SNConvTranspose, ResBlock
 
 
diff --git a/tools/style_text_rec/arch/encoder.py b/tools/style_text_rec/arch/encoder.py
index a304fcae..b884cda2 100644
--- a/tools/style_text_rec/arch/encoder.py
+++ b/tools/style_text_rec/arch/encoder.py
@@ -13,6 +13,7 @@
 # limitations under the License.
 import paddle
 import paddle.nn as nn
+
 from arch.base_module import SNConv, SNConvTranspose, ResBlock
 
 
diff --git a/tools/style_text_rec/arch/spectral_norm.py b/tools/style_text_rec/arch/spectral_norm.py
index 349043ca..21d0afc8 100644
--- a/tools/style_text_rec/arch/spectral_norm.py
+++ b/tools/style_text_rec/arch/spectral_norm.py
@@ -11,10 +11,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
-import math
-import numpy as np
-
 import paddle
 import paddle.nn as nn
 import paddle.nn.functional as F
diff --git a/tools/style_text_rec/arch/style_text_rec.py b/tools/style_text_rec/arch/style_text_rec.py
index 0686045d..599927ce 100644
--- a/tools/style_text_rec/arch/style_text_rec.py
+++ b/tools/style_text_rec/arch/style_text_rec.py
@@ -11,9 +11,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-import numpy as np
-import cv2
-import math
 import paddle
 import paddle.nn as nn
 
diff --git a/tools/style_text_rec/engine/corpus_generators.py b/tools/style_text_rec/engine/corpus_generators.py
index 9f5758a5..186d15f3 100644
--- a/tools/style_text_rec/engine/corpus_generators.py
+++ b/tools/style_text_rec/engine/corpus_generators.py
@@ -1,6 +1,18 @@
+#   Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserve.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 import random
-from PIL import Image, ImageDraw, ImageFont
-import numpy as np
+
 from utils.logging import get_logger
 
 
diff --git a/tools/style_text_rec/engine/synthesisers.py b/tools/style_text_rec/engine/synthesisers.py
index 4ef2d1c4..177e3e04 100644
--- a/tools/style_text_rec/engine/synthesisers.py
+++ b/tools/style_text_rec/engine/synthesisers.py
@@ -1,3 +1,16 @@
+#   Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserve.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 import os
 
 from utils.config import ArgsParser, load_config, override_config
diff --git a/tools/style_text_rec/engine/text_drawers.py b/tools/style_text_rec/engine/text_drawers.py
index c44c840c..8aaac06e 100644
--- a/tools/style_text_rec/engine/text_drawers.py
+++ b/tools/style_text_rec/engine/text_drawers.py
@@ -1,4 +1,3 @@
-import random
 from PIL import Image, ImageDraw, ImageFont
 import numpy as np
 from utils.logging import get_logger
diff --git a/tools/style_text_rec/tools/synth_dataset.py b/tools/style_text_rec/tools/synth_dataset.py
index 54f366a8..4a0e6d5e 100644
--- a/tools/style_text_rec/tools/synth_dataset.py
+++ b/tools/style_text_rec/tools/synth_dataset.py
@@ -1,3 +1,16 @@
+#   Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserve.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 from engine.synthesisers import DatasetSynthesiser
 
 
diff --git a/tools/style_text_rec/utils/config.py b/tools/style_text_rec/utils/config.py
index f11b7826..d028b7c4 100644
--- a/tools/style_text_rec/utils/config.py
+++ b/tools/style_text_rec/utils/config.py
@@ -13,7 +13,6 @@
 # limitations under the License.
 import yaml
 import os
-from collections import OrderedDict
 from argparse import ArgumentParser, RawDescriptionHelpFormatter
 
 
diff --git a/tools/style_text_rec/utils/load_params.py b/tools/style_text_rec/utils/load_params.py
index 943fd262..be056136 100644
--- a/tools/style_text_rec/utils/load_params.py
+++ b/tools/style_text_rec/utils/load_params.py
@@ -11,13 +11,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-
 import os
-
 import paddle
 
 __all__ = ['load_dygraph_pretrain']
diff --git a/tools/style_text_rec/utils/logging.py b/tools/style_text_rec/utils/logging.py
index 295900e8..f700fe26 100644
--- a/tools/style_text_rec/utils/logging.py
+++ b/tools/style_text_rec/utils/logging.py
@@ -11,7 +11,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 import os
 import sys
 import logging