Arthroscopic surgery can cause frozen shoulder. If the shoulder joint is inactive for a long time after the surgery and no rehabilitation exercise is performed in time, it will cause extensive adhesion of muscles, tendons, joint capsule and synovial membrane around the shoulder joint, resulting in shoulder joint pain and obvious limitation of activities. Shoulder joint is stiff, afraid of cold, active and passive activities are limited. After arthroscopic surgery of shoulder joint, if it is joint cleaning surgery, the surgery should be done as early as possible to prevent adhesion of shoulder joint. If it is rotator cuff repair surgery, it needs to be immobilized with shoulder abduction brace in the early stage. During the period of immobilization, pendulum movement should be performed under the doctor’s guidance, and elbow and wrist joints should be moved at the same time to prevent muscle atrophy, and the range of activities can be increased appropriately after one month, from passive to active activities. Frozen shoulder is easy to occur after arthroscopic surgery, and it is necessary to actively exercise to prevent frozen shoulder.