The treatment of anterior cruciate ligament injury of the knee is closely related to the specific degree of injury, specifically the following points: 1, relatively minor anterior cruciate ligament injury of the knee, the main conservative treatment, you can use a cast or movable brace for fixation, during this period to carry out the necessary functional exercise to prevent muscle atrophy. After removal of the cast, knee flexion and extension activities should be carried out, and the recovery period should be treated with blood-stasis activating drugs, such as bruising tablets, etc. 2. When the ACL injury is more serious, especially severe tears or ligament rupture, surgery should be considered to reconstruct the ligament or use artificial ligaments and repair them under arthroscopy, and systematic functional exercises should be carried out at a later stage, preferably with professional rehabilitation. Restoring the range of motion and strength of the knee joint. The specific treatment needs to be determined in conjunction with the physical examination, the patient’s activity requirements, and the MRI examination.