Temporomandibular joint belongs to oral and maxillofacial surgery. When temporomandibular joint disorder occurs, local adjustment is needed to correct the misaligned occlusion, adjust the severely crowded and misaligned teeth, repair missing teeth, adjust the lateral chewing habits, wear jaw plates to relieve joint pressure, and also cooperate with acupuncture and physical therapy to relieve the pain of the muscles around the joint. When chronic adhesions occur in the joint cavity leading to joint restriction, lidocaine with hormones can be used for joint irrigation. When trauma leads to joint fracture, the joint cavity can be incised under general anesthesia for internal fixation surgery, which will not leave serious scars after healing.