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. Because the injury is violent and often combined with other major structural injuries, improper diagnosis and treatment will delay the treatment, and the functional instability caused by the injury will not meet the needs of daily life and sports, and may lead to a series of sequelae of the knee, so surgery should be performed to reconstruct the ligament and its function. Arthroscopic technology is the first minimally invasive technology used in orthopedics. Since its application in the clinic, it has greatly improved the diagnosis of joint disease and has performed many intra-articular lesions that are difficult to perform with conventional surgery. It has not only expanded from the knee joint alone at its inception to include the shoulder, elbow, wrist, hip, ankle and even interphalangeal joints, but has also evolved from the simple management of meniscal injuries and synovial diseases to the ability to perform meniscal transplants, anterior and posterior cruciate ligament reconstruction and cartilage defect transplantation.