Wrist arthroscopy is now a common method to diagnose wrist joint diseases. Due to technical and theoretical knowledge, wrist arthroscopy is carried out in few hospitals, probably because the department is getting more and more subdivided, and wrist arthroscopy is in an awkward position, which has been carried out in our hospital for 3 years. Triangular fibrocartilage injury is a common cause of wrist pain, manifestation: ulnar side of the wrist pain, may be accompanied by ringing, with a history of trauma, examination including neutral rotation anterior and lateral MRi examination can find more details. Treatment: If conservative treatment is given and ineffective, arthroscopic surgery can be performed, and the corresponding treatment is carried out according to different lesions during surgery, and the postoperative results are satisfactory.