The shoulder joint is the most mobile joint in the body, and as the pivot of the upper limb movement, it plays a decisive role in the normal function of the entire upper limb. As a result, damage to the shoulder joint can seriously affect the quality of life of patients. The development of shoulder surgery, especially the application of arthroscopy in this field, has enabled the majority of shoulder disorders to be effectively treated and satisfactorily rehabilitated. The following is a brief description of the main indications for shoulder arthroscopy. 1. Recurrent anterior instability of the shoulder joint Habitual dislocation of the shoulder joint is the result of poor soft tissue repair around the shoulder joint after traumatic dislocation. The most common of these is the habitual anterior dislocation of the shoulder joint, which is an anterior instability of the shoulder joint caused by the avulsion of the anterior capsule/glenoid labrum complex from the glenoid margin, i.e. Bankart injury. The principle of surgery is to loosen the displaced anterior capsule/glenoid labrum complex and apply suture anchors to reposition the above structures to the glenoid margin. 2. Rotator cuff tear A rotator cuff tear is a rupture of the combined tendons of the rotator cuff musculature. The rotator cuff muscle group refers to the four muscles that start at the scapula and end at the humeral tuberosity. This group of muscles is responsible for rotation and abduction of the shoulder joint. Rotator cuff tears can therefore lead to varying degrees of limitation of motion in the shoulder joint and are associated with pain. Trauma and repeated chronic injuries are the causes of rotator cuff tears. Arthroscopic surgery is now the routine treatment for this condition. The procedure involves microscopic release of the surrounding rotator cuff tissues, screwing in a suture anchor at the stop of the rotator cuff in large or small nodules, and repositioning and suturing the displaced tendon. 3.Frozen shoulder Freezing shoulder is most common in people around 50 years old, thus it is also called fifty shoulder. It is caused by fibrosis and thickening of the joint capsule and adhesions between the soft tissues around the joint at various levels, which eventually develop into contracture of the shoulder capsule. The symptoms may resolve on their own after conservative treatment, but it can take more than a year, and varying degrees of dysfunction may remain. Arthroscopic release of the joint capsule is a new method of treatment for frozen shoulder. This method has gradually replaced the traditional manual release. The procedure involves arthroscopic release of the shoulder capsule and capsule ligaments with an electric knife, followed by manual manipulation to further improve mobility.