Elbow arthroscopy is not a commonly performed procedure. Elbow arthroscopy is technically demanding and the surgeon must be very familiar with the vascular nerve anatomy around the elbow joint to avoid accidental injury to this structure. During elbow arthroscopy, the instruments and arthroscope must pass through the deep muscular layer, and the access is adjacent to a variety of important vascular and neurological structures. Early studies of elbow anatomy concluded that the elbow joint was not suitable for arthroscopic surgery because the risk of neurovascular damage from arthroscopy was much greater than the benefit of arthroscopic consultation. In recent years, with advances in instrumentation and technology, the discovery of new surgical positions and in-depth studies of elbow anatomy, the risks of elbow arthroscopy have been greatly reduced and the indications for surgery have been expanded to include a variety of elbow disorders such as free bodies, synovitis, osteoarthritis and elbow ankylosis. Common indications for elbow arthroscopy include: removal of free bodies, treatment of humeral tuberosity osteochondral debridement, treatment of radial tuberosity and osteochondral defects, clearance and release of partial adhesions of the elbow joint, joint clearance for traumatic osteoarthritis and degenerative osteoarthritis of the elbow joint, partial excision of the synovial pattern, release of flexion contractures of the elbow joint, flushing and clearance of septic arthritis, and diagnosis of chronic elbow pain. Contraindications: Elbow arthroscopy is contraindicated in patients with any cause that alters the normal bone and soft tissue anatomy of the elbow joint, making it impossible for the surgeon to determine the location of the vascular nerve structures and therefore the safe entrance, skin infections, defects, scarring, etc. Postoperative rehabilitation CPM is helpful for postoperative rehabilitation. For 3 weeks postoperatively, the elbow is splinted in a rotated posterior extension position for the rest of the day, including the night, except for rehabilitation, and after 3 weeks, the splinting can be removed if there is sufficient extension angle. Active and passive rehab should be performed 1-2 times a day for 6 weeks after surgery.