The anterior cruciate ligament, also known as the anterior cruciate ligament, is located within the knee joint and connects the femur to the tibia, its main role is to limit excessive forward displacement of the tibia. This ligament should be treated promptly after injury to achieve better results. (1) Apply ice to the knee joint to reduce swelling and pain. (2) Braking the joint and applying pressure bandages if necessary to reduce rebleeding. (3) For patients who are not eligible for recent surgery, knee mobility exercises and lower extremity muscle strength exercises should be performed after the swelling and pain have subsided to promote the recovery of knee mobility. (4) In case of combined medial collateral ligament injury, emergency surgical treatment should be performed within 10 days of the injury for a limited period of time, and if there is joint mobility impairment, surgery should be performed after the range of joint movement is close to normal. Surgical treatment The best treatment option for patients with complete ACL rupture is surgical reconstruction of the ACL, and the surgical treatment includes: (1) the best time for surgery is within three months after surgery; (2) arthroscopic ACL reconstruction surgery is a mature technique with little trauma and fast recovery; (3) the current surgical methods for ACL reconstruction include single-bundle reconstruction and double-bundle reconstruction, and there is no significant difference in clinical results between the two types of surgery. There is no significant difference between the clinical results of the two procedures. (4) The graft materials that can be used to reconstruct the ACL include: autologous materials, such as N cord tendon and autologous patellar tendon, which have the best effect. If multiple ligaments are injured at the same time, additional allograft tendons or artificial ligaments can be considered; (5) The fixation materials required for ACL reconstruction include metal interface screws, absorbable interface screws, etc.; (6) In case of combined medial collateral ligament injury or meniscal interlock, emergency surgery should be performed for a limited period of time.