Is reconstructive surgery required to treat a torn anterior cruciate ligament (ACL)? The purpose of reconstructing the ACL is to restore stability to the knee joint, provide a foundation for daily life and sports, and avoid further damage to the meniscus and cartilage. Therefore, regardless of the patient’s age, autologous N cord muscle reconstruction surgery can be used in all patients who wish to restore motor function. It has been argued that all patients with ACL rupture should be treated conservatively at an early stage, and then surgically in patients who fail conservative treatment. We disagree with this view because conservative treatment does not promote repair of a completely ruptured ACL and only prolongs the overall recovery time. Moreover, there is a risk of re-injury due to knee instability during conservative treatment, leading to further knee injury, such as meniscal tears, bone contusions, cartilage damage, and complete rupture of the originally partially ruptured ligament. Therefore, we recommend that patients who want to return to normal life should undergo reconstructive surgery as early as possible. The purpose of early reconstruction is to restore the stability of the knee joint, restore the original level of motion, and avoid further damage to the knee joint.