OBBDetection is a directed object detection toolbox based on MMdetection v2.2. It implements multiple oriented object detection algorithms including RoI Transformer, Gliding Vertex, Oriented R-CNN, S2ANet, Double Head OBB, and FCOS OBB. The library supports multiple bounding box representations: horizontal boxes, oriented boxes, and 4-point polygon boxes. It inherits the modular architecture of MMdetection, allowing flexible configuration of backbones, RPN, samplers, and assigners.