The normal range of shoulder joint activity includes 80~90 degrees of abduction, 20~40 degrees of adduction, 70~90 degrees of forward flexion, 40 degrees of backward extension, 45~60 degrees of external rotation and 45~70 degrees of internal rotation. Normal shoulder joint activity is very flexible, is one of the most flexible joints in the human body, if there is limited shoulder joint activity may be frozen shoulder, because of the ligament around the shoulder joint, joint capsule, joint adhesion caused by limited activity, active and passive activities are limited. It may also be caused by shoulder joint injury, such as rotator cuff injury, with limited active activities and normal passive activities, accompanied by pain in shoulder joint activities. Patients with abnormal shoulder joint movement should go to the hospital in time and follow the doctor’s instructions for treatment to avoid delaying their condition.