[Objective] To introduce the surgical technique and preliminary clinical results of arthroscopic repair of wrist triangular fi-brocartilage complex (TFCC) by sutures through the double transosseous tunnels in Y shape. [Methods] From June 2021 to February 2022,6 patients underwent abovementioned surgical procedures for type IB TFCC tear. First all, arthroscopic debridement was performed withsynovium and fibrovascular granulation tissue removed, and TFCC clearly exposed. The "Y" shaped double transosseous tunnels was pre-pared by drilling Kirschner wires into the volar border of the ulna styloid ulnar about 3cm away from the cartilage surface. As double bundleof sutures were introduced through the bone tunnels, the deep and superficial, or the volar and dorsal portions of the TFCC were threadedunder the arthroscope, and fixed by fastening the sutures. [Results] All the 6 patients successfully completed the operation without seriouscomplications, and followed up for (10.2±3.5) months on an average. Compared with those preoperatively, VAS scores [(3.3±1.2), (1.3±0.8),P＜0.001], Mayo score [(43.0 ±6.1), (92.7±3.4), P＜0.001], wrist extension-flexion range of motion (ROM) [(100.7±8.6)°, (152.3±5.5)°, P＜0.001], ulnar radial deviation ROM [(17.8±5.0)°, (36.2±2.1)°, P＜0.001], forearm rotation ROM [(114.5±10.3)°, (158.8±2.2)°, P＜0.001] weresignificantly improved at the latest follow-up. Furthermore, the radioulnar space under stress X-ray was of (2.3±0.6) mm, with well integri-ty of TFCC revealed by MRI at the latest interview. [Conclusion] This wrist arthroscopy assisted suture of type IB TFCC tear with doubletransosseous tunnels in Y shape is safe and reliable, and can significantly improve the wrist joint function of the patients.