The study aims to evaluate the results of recovering the function of the shoulder and the anatomy of the acromioclavicular (AC) joint through surgical treatment by using fiberwire suture augmentation for acute acromioclavicular joint dislocation. The procedure involves open reduction of the AC joint, anchoring the lateral clavicle to the coracoid with fiberwire suture according to the anatomical position of the trapezoid and conoid ligaments. At the same time, temporarily fix AC joint with K-wires. The results showed that 91.3% of patients recovered from good to very good function. Results of anatomical recovery based on postoperative radiographic monitoring showed that 79.3% of patients did not dislocate, and 15.5% had sub-dislocation. Thus, the surgical treatment of acute AC joint dislocation with fiberwire suture gave good results in shoulder function and anatomical AC joint recovery.