PaddleSeg is a comprehensive image segmentation library built on the PaddlePaddle deep learning framework. It provides a collection of pre-trained segmentation models and supports the full workflow from data preparation and training to model evaluation and deployment. The library covers practical segmentation tasks including semantic segmentation, interactive segmentation, panoptic segmentation, image matting, 3D segmentation, and video segmentation across applications in autonomous driving, medical imaging, and human analysis.