The acromioclavicular joint is the fulcrum of the upper limb movement and occupies an important position in the function and dynamics of the scapular girdle. It is one of the indispensable joints for upper limb abduction and supination, and is also involved in the forward flexion and back extension movements of the shoulder joint. Since the acromioclavicular joint is located under the skin, it is easy to be seen to be locally elevated, and it is more obvious in bilateral pairs. There may be local pain, swelling and pressure pain; it is difficult to abduct or supinate the injured limb, and the forward flexion and back extension movements are also limited, and the local pain is increased. A depression can be felt at the acromioclavicular joint during the examination, and the acromioclavicular joint can be felt to be loose. According to the degree of injury and ligament rupture, Zlotsky, etc., it is classified into three levels or three types. Type I: There are few tears of ligaments and capsule fibers at the acromioclavicular joint, the joint is stable, pain is mild, radiographs show normal, but later there may be shadows of periosteal calcification at the lateral end of the clavicle. Type II: There is a tear of the acromioclavicular joint capsule and acromioclavicular ligament, no damage to the rostral ligament, the external end of the clavicle is cocked and semi-dislocated, there is a floating sensation with pressure, and there may be back and forth movement. x-ray shows that the external end of the clavicle is higher than the shoulder peak. Type III: The acromioclavicular ligament and rostral ligament are torn at the same time, causing obvious dislocation of the acromioclavicular joint. The following is the postoperative picture of the surgical treatment of shoulder-clavicular joint dislocation type III.