diff --git a/doc/doc_ch/installation.md b/doc/doc_ch/installation.md
index 0dddfec0a6e17e26a73d284ac98c9c95e449c378..36565cd4197a9b8b8404f57b378aa49637cdc58b 100644
--- a/doc/doc_ch/installation.md
+++ b/doc/doc_ch/installation.md
@@ -58,7 +58,7 @@ git clone https://gitee.com/paddlepaddle/PaddleOCR
 **4. 安装第三方库**
 ```
 cd PaddleOCR
-pip3 install -r requirments.txt
+pip3 install -r requirements.txt
 ```
 
 注意，windows环境下，建议从[这里](https://www.lfd.uci.edu/~gohlke/pythonlibs/#shapely)下载shapely安装包完成安装，
diff --git a/doc/doc_ch/tree.md b/doc/doc_ch/tree.md
index 511860869188020ccfe7531db55ecc5008ccb56b..5f048db022dbe422a78f87b0236d04e00ccc4d48 100644
--- a/doc/doc_ch/tree.md
+++ b/doc/doc_ch/tree.md
@@ -115,7 +115,7 @@ PaddleOCR
 │   │   │   ├── text_image_aug              // 文本识别的 tia 数据扩充
 │   │   │   │   ├── __init__.py
 │   │   │   │   ├── augment.py              // tia_distort,tia_stretch 和 tia_perspective 的代码
-│   │   │   │   ├── warp_mls.py 
+│   │   │   │   ├── warp_mls.py
 │   │   │   ├── __init__.py
 │   │   │   ├── east_process.py             // EAST 算法的数据处理步骤
 │   │   │   ├── make_border_map.py          // 生成边界图
@@ -167,7 +167,7 @@ PaddleOCR
 │   │   │   ├── det_east_head.py            // EAST 检测头
 │   │   │   ├── det_sast_head.py            // SAST 检测头
 │   │   │   ├── rec_ctc_head.py             // 识别 ctc
-│   │   │   ├── rec_att_head.py             // 识别 attention 
+│   │   │   ├── rec_att_head.py             // 识别 attention
 │   │   ├── transforms                      // 图像变换
 │   │   │   ├── __init__.py                 // 构造 transform 相关代码
 │   │   │   └── tps.py                      // TPS 变换
@@ -185,7 +185,7 @@ PaddleOCR
 │   │   └── sast_postprocess.py             // SAST 后处理
 │   └── utils                               // 工具
 │       ├── dict                            // 小语种字典
-│            ....                            
+│            ....  
 │       ├── ic15_dict.txt                   // 英文数字字典，区分大小写
 │       ├── ppocr_keys_v1.txt               // 中文字典，用于训练中文模型
 │       ├── logging.py                      // logger
@@ -207,10 +207,10 @@ PaddleOCR
 │   ├── program.py                          // 整体流程
 │   ├── test_hubserving.py
 │   └── train.py                            // 启动训练
-├── paddleocr.py 
+├── paddleocr.py
 ├── README_ch.md                            // 中文说明文档
 ├── README_en.md                            // 英文说明文档
 ├── README.md                               // 主页说明文档
-├── requirments.txt                         // 安装依赖
+├── requirements.txt                         // 安装依赖
 ├── setup.py                                // whl包打包脚本
-├── train.sh                                // 启动训练脚本
\ No newline at end of file
+├── train.sh                                // 启动训练脚本
diff --git a/doc/doc_en/installation_en.md b/doc/doc_en/installation_en.md
index 073b67b04d10cc2ae4b20f0ca38b604ab95bc09f..7f1f0e83c94e4d4a18b99d620b4b192c47ffde7c 100644
--- a/doc/doc_en/installation_en.md
+++ b/doc/doc_en/installation_en.md
@@ -61,7 +61,7 @@ git clone https://gitee.com/paddlepaddle/PaddleOCR
 **4. Install third-party libraries**
 ```
 cd PaddleOCR
-pip3 install -r requirments.txt
+pip3 install -r requirements.txt
 ```
 
 If you getting this error `OSError: [WinError 126] The specified module could not be found` when you install shapely on windows.
diff --git a/doc/doc_en/tree_en.md b/doc/doc_en/tree_en.md
index be2f5733d3c30af8c83f1072cd0aea07865bacc3..cf9ccb38dcc0e5f70577f18933a5373d1ffa992a 100644
--- a/doc/doc_en/tree_en.md
+++ b/doc/doc_en/tree_en.md
@@ -116,7 +116,7 @@ PaddleOCR
 │   │   │   ├── text_image_aug              // Tia data augment for text recognition
 │   │   │   │   ├── __init__.py
 │   │   │   │   ├── augment.py              // Tia_distort,tia_stretch and tia_perspective
-│   │   │   │   ├── warp_mls.py 
+│   │   │   │   ├── warp_mls.py
 │   │   │   ├── __init__.py
 │   │   │   ├── east_process.py             // Data processing steps of EAST algorithm
 │   │   │   ├── iaa_augment.py              // Data augmentation operations
@@ -188,7 +188,7 @@ PaddleOCR
 │   │   └── sast_postprocess.py             // SAST post-processing
 │   └── utils                               // utils
 │       ├── dict                            // Minor language dictionary
-│            ....                            
+│            ....  
 │       ├── ic15_dict.txt                   // English number dictionary, case sensitive
 │       ├── ppocr_keys_v1.txt               // Chinese dictionary for training Chinese models
 │       ├── logging.py                      // logger
@@ -210,10 +210,10 @@ PaddleOCR
 │   ├── program.py                          // Inference system
 │   ├── test_hubserving.py
 │   └── train.py                            // Start training script
-├── paddleocr.py 
+├── paddleocr.py
 ├── README_ch.md                            // Chinese documentation
 ├── README_en.md                            // English documentation
 ├── README.md                               // Home page documentation
-├── requirments.txt                         // Requirments
+├── requirements.txt                         // Requirements
 ├── setup.py                                // Whl package packaging script
-├── train.sh                                // Start training bash script
\ No newline at end of file
+├── train.sh                                // Start training bash script