Abstract: ［Abstract］Objective To analyze the clinical effect of endobutton system reconstituting coracoclavicular ligament in treatment of upper type Rockwood III acromioclavicular joint dislocation. Methods We retrospectively analyzed the data of 22 patients with Rockwood III-VI acromio+J65clavicular joint dislocation treated with endobutton system reconstituting coracoclavicular ligament from January 2012 to June 2014， including 7 cases of Rockwood type III，10 cases of Rockwood IV， 3 cases of Rockwood V and 2 cases of Rockwood 2. The operation time， postoperative shoulder joint activity， X-ray and postoperative complications were observed. The shoulder function on 3 months and 6 months after operation was evaluated by Constant-Murley scores. Results All the 22 patients with different classification of acromioclavicular joint dislocation were followed up， for 6 to 18 months， with an average of 12 months， the operation time was 45-70 min， with an average of 55 min， and no complications such as plate fracture， emergence， dislocation， shoulder peak impact， and postoperative pain occurred. The Constant-Murley score of shoulder function 3 moths and 6 months after operation was （90.06±3.7） and（95.12±1.6）， respectively. Conclusion　Endobutton system reconstituting coracoclavicular ligament for treatment of acromioclavicular joint dislocation has good curative effect，and has the advantages of simple operation，less complications，and satisfactory recovery of shoulder joint function，is an ideal elastic fixed way for biological stability recovery of the acromioclavicular joint dislocation.