diff --git a/doc/doc_ch/thirdparty.md b/doc/doc_ch/thirdparty.md
index cd521d090f556812f27c66f208ee9508dc4d986f..c911fee5d8e4b29b8852a9f6e59cc7642f9898de 100644
--- a/doc/doc_ch/thirdparty.md
+++ b/doc/doc_ch/thirdparty.md
@@ -25,6 +25,7 @@ PaddleOCR希望可以通过AI的力量助力任何一位有梦想的开发者实
 | 垂类工具 | [id_card_ocr](https://github.com/baseli/id_card_ocr)         | 身份证复印件识别           | [baseli](https://github.com/baseli)                          |
 | 垂类工具 | [Paddle_Table_Image_Reader](https://github.com/thunder95/Paddle_Table_Image_Reader) | 能看懂表格图片的数据助手   | [thunder95](https://github.com/thunder95])                   |
 | 前后处理 | [paddleOCRCorrectOutputs](https://github.com/yuranusduke/paddleOCRCorrectOutputs) | 获取OCR识别结果的key-value | [yuranusduke](https://github.com/yuranusduke)                |
+|前处理| [optlab](https://github.com/GreatV/optlab) |OCR前处理工具箱，基于Qt和Leptonica。|[GreatV](https://github.com/GreatV)|
 
 ### 1.2 为PaddleOCR新增功能