diff --git a/doc/doc_ch/installation.md b/doc/doc_ch/installation.md
index 226af740270788ca99e886d7cdde0419e8703008..8d7b659eb3c71df38f57b01e8510680ae135e35f 100644
--- a/doc/doc_ch/installation.md
+++ b/doc/doc_ch/installation.md
@@ -3,7 +3,7 @@
 经测试PaddleOCR可在glibc 2.23上运行，您也可以测试其他glibc版本或安装glic 2.23
 PaddleOCR 工作环境
 - PaddlePaddle 1.7+
-- python3
+- python3.7
 - glibc 2.23
 - cuDNN 7.6+ (GPU)
 
@@ -47,7 +47,19 @@ docker images
 hub.baidubce.com/paddlepaddle/paddle   latest-gpu-cuda9.0-cudnn7-dev    f56310dcc829
 ```
 
-2. 安装PaddlePaddle Fluid v1.7
+2. 更改python3默认版本
+
+docker中的python默认使用python3.5，PaddleOCR需要在Python3.7下执行（该版本下，对于第三方依赖库的兼容性更好一些）。进入docker后，可以编辑`/etc/profile`文件，之后在文件末尾添加
+
+```shell
+
+alias python3=python3.7
+alias pip3=pip3.7
+```
+
+保存之后，使用`source /etc/profile`命令使设置的默认Python生效。
+
+3. 安装PaddlePaddle Fluid v1.7
 ```
 pip3 install --upgrade pip
 
@@ -64,7 +76,7 @@ python3 -m pip install paddlepaddle==1.7.2 -i https://pypi.tuna.tsinghua.edu.cn/
 更多的版本需求，请参照[安装文档](https://www.paddlepaddle.org.cn/install/quick)中的说明进行操作。
 ```
 
-3. 克隆PaddleOCR repo代码
+4. 克隆PaddleOCR repo代码
 ```
 【推荐】git clone https://github.com/PaddlePaddle/PaddleOCR
 
@@ -75,7 +87,7 @@ git clone https://gitee.com/paddlepaddle/PaddleOCR
 注：码云托管代码可能无法实时同步本github项目更新，存在3~5天延时，请优先使用推荐方式。
 ```
 
-4. 安装第三方库
+5. 安装第三方库
 ```
 cd PaddleOCR
 pip3 install -r requirments.txt
diff --git a/doc/doc_en/installation_en.md b/doc/doc_en/installation_en.md
index 9e4df74f6ddf3500262583e1d08bef12c4e14403..94aacd6d24ff0a2cab12d1820a110ef95f8c4e8b 100644
--- a/doc/doc_en/installation_en.md
+++ b/doc/doc_en/installation_en.md
@@ -4,7 +4,7 @@ After testing, paddleocr can run on glibc 2.23. You can also test other glibc ve
 
 PaddleOCR working environment:
 - PaddlePaddle1.7
-- python3
+- python3.7
 - glibc 2.23
 
 It is recommended to use the docker provided by us to run PaddleOCR, please refer to the use of docker [link](https://docs.docker.com/get-started/).
@@ -49,7 +49,20 @@ docker images
 hub.baidubce.com/paddlepaddle/paddle   latest-gpu-cuda9.0-cudnn7-dev    f56310dcc829
 ```
 
-2. Install PaddlePaddle Fluid v1.7 (the higher version is not supported yet, the adaptation work is in progress)
+2. Change default version of python3
+
+Python3.5 is used as the default version of python. However, Python3.7 is preferred in PaddleOCR for better compatibility of third-party libraries. After entering docker, you can edit file `/etc/profile`, add the following content at the end of the file.
+
+
+```shell
+
+alias python3=python3.7
+alias pip3=pip3.7
+```
+
+After saving the file `/etc/profile`. The command `source /etc/profile` needs to be carried out to make the default python version as 3.7 effective.
+
+3. Install PaddlePaddle Fluid v1.7 (the higher version is not supported yet, the adaptation work is in progress)
 ```
 pip3 install --upgrade pip
 
@@ -65,7 +78,7 @@ python3 -m pip install paddlepaddle==1.7.2 -i https://pypi.tuna.tsinghua.edu.cn/
 For more software version requirements, please refer to the instructions in [Installation Document](https://www.paddlepaddle.org.cn/install/quick) for operation.
 
 
-3. Clone PaddleOCR repo
+4. Clone PaddleOCR repo
 ```
 # Recommend
 git clone https://github.com/PaddlePaddle/PaddleOCR
@@ -77,7 +90,7 @@ git clone https://gitee.com/paddlepaddle/PaddleOCR
 # Note: The cloud-hosting code may not be able to synchronize the update with this GitHub project in real time. There might be a delay of 3-5 days. Please give priority to the recommended method.
 ```
 
-4. Install third-party libraries
+5. Install third-party libraries
 ```
 cd PaddleOCR
 pip3 install -r requirments.txt