Abstract:[Objective] To compare the clinical outcomes of arthroscopic double-bundle coracoclavicular reconstruction with 3 button plates (DB), arthroscopic single- bundle reconstruction with 2 button plates (SB) and traditional open hook plate fixation (HP) for acute Rockwood type III acromioclavicular dislocation. [Methods] A retrospective study was conducted on 49 patients who received surgical treatment for Rockwood type III acromioclavicular dislocation in our hospital from October 2016 to December 2020. According to preopera- tive doctor-patient communication, 15 patients underwent DB, 17 were treated with SB, while the remaining 17 received HP. The periopera- tive period, follow-up and imaging data were compared among the three groups. [Results] All the three groups were successfully operated on without serious complications. The DB and SB groups proved significantly superior to the HP group in terms of incision length, intraoper- ative blood loss and postoperative hospital stay (P<0.05). The VAS score for pain decreased significantly over time during the early stage in all three groups (P<0.05), which in DB and SB groups were significantly less than that in the HP group 4 and 14 days after surgery (P< 0.05). All patients were followed up for more than 12 months, the DB group and SB group resumed full weight-bearing activities significant- ly earlier than the HP group (P<0.05). The Constant-Murley scores, abduction range of motion (ROM), forward flexion ROM, and internal-external rotation ROM significantly increased over time in all the three groups (P<0.05). Although there was no significant differences in the abovesaid parameters among the three groups before surgery (P>0.05), the DB group were significantly better in those than the SB group and HP group at 3 months and the latest follow-up (P<0.05). As for imaging, the acromioclavicular distance (ACD) and coracoclavicular dis- tance (CCD) significantly reduced postoperatively in all the three groups compared with those preoperatively (P<0.05). There was no signifi- cant difference in ACD among all groups at time points accordingly (P>0.05), but the DB group and SB group proved significantly superior to the HP group in term of CCD at 2 weeks postoperatively and the latest follow-up (P<0.05). [Conclusion] The arthroscopic DB coracocla- vicular reconstruction with 3 button plates does achieve better clinical outcomes than the SB reconstruction and traditional open HP fixa- tion for acute Rockwood type III acromioclavicular dislocation in this study.