Many young people who love sports inevitably suffer from knee trauma, after the injury, the knee joint swelling and pain is limited, after a period of rest, the swelling and pain can often be relieved than at the beginning, but often left knee joint pain, weakness, playing soft legs, sports with the affected knee can not make the full force of the symptoms, decreased athletic ability, and in severe cases, even knee joint interlock, the affected knee can not be fully straight or fully flexed. In fact, this condition is often due to damage to the cruciate ligament in the knee joint. The cruciate ligament in the knee is the main structure that stabilizes the knee joint and is divided into the anterior cruciate ligament and the posterior cruciate ligament, which is more prone to injury. A common mechanism for ACL injuries is twisting or sudden deceleration without direct contact, such as in a car accident, sudden movement or jumping in ball sports. The injury can be characterized by a distinct rupture sound and severe pain, joint swelling and intra-articular blood accumulation. The chronic phase shows knee weakness, slipping, locking, and instability, which is more pronounced during running, jumping, and sliding. Due to the poor self-repair ability after ACL rupture injury, this injury often cannot be healed by resting and braking, and over time knee laxity leads to successive degeneration, wear and tear of the meniscus and cartilage in the joint, which eventually evolves into osteoarthritis. The immediate goal of ACL injury treatment is to restore knee stability and patient activity levels, and the long-term goal is to delay the onset of osteoarthritis, which should be based on restoration of stability. Surgical reconstruction of the ACL provides knee stability and is important in delaying the onset of osteoarthritis. Arthroscopic reconstruction of the ACL is already a very mature procedure with the advantages of accurate fixation points, minimal trauma, and rapid recovery, and is now considered the treatment of choice.