Abstract:[Objective] To introduce the surgical technique and preliminary clinical results of arthroscopic superior capsule reconstruc- tion (SCR) with fascia lata autograft for irreparable massive rotator cuff tears (IRCT) . [Methods] From January 2018 to January 2020, 27 patients received the abovementioned surgical procedure for IRCT. After a thorough arthroscopic examination, the degenerated and tensionlose tissue was debrided, and the long head of biceps tendon (LHBT) was cut and fixed, or transferred individually as an appropriate mea- sure. According to the actual defect of the superior capsule, the fascia lata on the ipsilateral thigh was harvested to prepare the graft. The graft was introduced using the pulley technique, secured on the glenoid side and humeral head side with suture anchors, and then sutured with the surrounding tissue. [Results] The operation was performed successfully in all the 27 patients without complications, such as nerve and vascular injury. Subscapularis muscle repair in 20 cases, while LHBT transfer in 20 cases, and LHBT cut in 7 cases were conducted si- multaneously. All of them got incision healed well after operation, and were followed up for (19.4±3.1) months on an average. The CMS, ASES and UCLA scores increased significantly (P<0.05) , whereas VAS score decreased significantly over time (P<0.05) . Radiographical- ly, the acromiohumeral distance (AHD) significantly increased postoperatively compared with that preoperatively (P<0.05) . All the patient maintained good graft appearance on images. [Conclusion] This arthroscopic superior capsule reconstruction (SCR) with fascia lata auto- graft is feasible technique for irreparable massive rotator cuff tears with satisfactory clinical outcomes in short-term.