Abstract:[Objective] To investigate the clinical efficacy of simultaneous arthroscopic reconstruction and repair for anterior cruciate ligament (ACL) rupture combined with lateral meniscus radial tear (LMRT) . [Methods] From January 1, 2019 to December 30, 2020, 14 patients received arthroscopic ACL reconstruction with I.D.E.A.L femoral insertion positioning and tendon autograft, and LMRT suture treatment for ACL rupture complicated with LMRT. The consequences regarding to perioperative period, follow-up and images were ana- lyzed. [Results] All the 14 patients were successfully operated on without infection, neurovascular injury and other complications. With time of follow-up lasted for (16.80±2.31) months, the Lysholm and IKDC scores, as well as knee range of motion (ROM) significantly in- creased (P<0.05) , moreover, the presentations in terms of Lachman test, anterior drawer test, McMurray test and pivot shift test significant- ly improved (P<0.05) . However, the Kellgren -Lawrence grade for osteoarthritis remained unchanged at the latest follow- up (P>0.05) . [Conclusion] Arthroscopic ACL reconstruction with I.D.E.A.L femur positioning and horizontal mattress plus vertical mattress suture for lateral meniscus radial tear are effective for ACL rupture complicated with LMRT,.