Cruciate ligament injuries in the knee usually do not recover on their own and require appropriate treatment. The cruciate ligament of the knee is an intra-articular structure, and after an injury occurs, the patient feels a tearing sensation within the joint, develops joint effusion and swelling, which can occur within a few hours, and may later lead to impaired movement and inability to walk, as well as combined bone contusions, meniscal injuries, and medial and lateral collateral ligament injuries. Injuries to the anterior cruciate ligament generally result in decreased forward stability of the knee, and injuries to the posterior cruciate ligament result in loss of posterior stability of the knee. These conditions usually do not recover on their own and can only be cured with aggressive surgical treatment to reconstruct the ligaments. If there is no significant rupture of the cruciate ligament injury in the knee, it can be treated with external fixation in a cast for about 4-6 weeks, oral medication to invigorate the blood and meridians, and, if necessary, minimally invasive arthroscopic treatment to restore the patient’s motion as much as possible.