Abstract:[Objective] To evaluate the clinical outcomes of open acromioplasty and osteoplasty of the humeral greater tuberosity combined with rotator cuff reattachment by doublerow suture anchors for the subacromial impingement secondary to malunion of humeral greater tuberosity fractures. [Methods] From June 2018 to October 2022, 17 patients received abovementioned surgical procedures for subacromial impingement secondary to malunion of humeral greater tuberosity fractures. The functional recovery of the affected shoulder was evaluated. [Results] All the 17 patients were smoothly operated on with incision healing in the first-stage without infection, and were followed up for 6~12 months. Compared with those preoperatively, the VAS score [(7.5±1.1), (1.2±0.7), P<0.001], UCLA score [(12.9±3.8), (30.9±2.2), P<0.001], Constant-Murley score [(50.7±12.1), (95.1±9.4), P<0.001] and lifting ROM [(94.9±12.1)°, (151.5±10.2)°, P<0.001], as well as relative height of humerus head measured on images [(6.1±1.2) mm, (10.3±0.7) mm, P<0.001] were significantly improved at the latest follow-up, although there were no significant changes in subacromial space, acromial index, and acromial tilt angle (P>0.05). [Conclusion] The open acromioplasty and osteoplasty of the humeral greater tuberosity combined with rotator cuff reattachment by double-row suture anchors do effectively improve the mobility of the affected shoulder, with improvement of the relative height of the humerus head for subacromial impingement secondary to malunion of humeral greater tuberosity fractures.