Abstract:[Objective] To evaluate the clinical efficacy of combined reconstruction of medial patellotibial ligament (MPFL) and medial patellotibial ligament (MPTL) in the treatment of recurrent patellar dislocation. [Methods] A total of 27 patients underwent MPFL and MPTL combined reconstruction using autogenous semitendinous tendon with tibial insertion preserved for recurrent patellar dislocation from May 2018 to September 27, 2021. Clinical and imaging results were evaluated. [Results] All 27 patients had operation performed successfully without serious complications such as blood vessel, nerve injury and lower limb venous thrombosis. As time elapsed preoperatively, 3 months postoperatively and the latest follow-up, the VAS score [(6.3±1.1), (1.6±0.5), (0.5±0.5), P＜0.001] significantly reduced, Kujala score [(51.9±3.0), (84.0±1.2), (93.2±1.1), P＜0.001], Lysholm score[(52.1±3.9), (83.1±2.6), (88.0±2.9), P＜0.001], knee extension-flexion ROM [(111.9±3.1)°, (122.6±1.7)°, (127.8±1.6)°, P＜0.001] significantly increased. As for image, the patellar tilt angle [(21.4±1.8)°, (8.1± 0.8)°, (7.3±0.6)°, P＜0.001], lateral patellar displacement [positive/negative, (13/14), (2/25), (2/25), P＜0.001] were significantly improved over time, whereas the TT-TG remained unchanged significantly (P＞0.05). [Conclusion] MPFL and MPTL combined reconstructions do effectively treat recurrent patellar dislocation, improve knee joint function, reduce pain, and are safe and effective treatment technique.