ACL injury is one of the most common and serious sports injuries. ACL tears cause knee instability, and improper treatment will cause severe knee dysfunction and even osteoarthritis. Due to the large violence of the injury, often combined with other major structural injuries, improper diagnosis and treatment will delay the treatment, and at the same time, due to the increasing attention to the mechanical function of the ACL, as well as the functional instability caused by the injury, the resulting knee joint can not meet the needs of daily life and sports, and secondary knee cartilage damage, meniscal damage, etc., and can lead to a series of sequelae of the knee joint, so it should be performed Surgery is required to reconstruct the ligament and its function. Jiang Changqing, Department of Sports Medicine and Rehabilitation, Peking University Shenzhen Hospital Clinical practice and research results indicate that early reconstruction should be performed after ACL rupture to restore the stability of the knee joint as soon as possible. At present, there is no universally accepted surgical method, and there is still a debate in academic circles as to which surgical method should be used to reconstruct ACL. Currently, there are 2 mainstream clinical reconstruction methods: anatomical single-beam reconstruction and planar double-beam reconstruction. According to our current study, our personal preference is to recommend anatomical double-bundle reconstruction for young adults with high motion, and deconvoluted single-bundle reconstruction for the elderly and children, because current studies have found that double-bundle anatomical reconstruction is better than single-bundle reconstruction in controlling rotational stability.