In clinical practice, ligament injuries are a relatively common condition, and most of them are caused by direct or indirect external forces. For example, if a patient suffers a partial injury to the medial collateral ligament of the knee joint, the patient should be treated conservatively by resting in bed, prohibiting activities, and fixing the knee joint with a cast or brace. At the same time, the knee joint can be externally applied with blood-stasis ointment or topical fotarine, and can also be combined with microwave therapy to accelerate local blood circulation, so that local bleeding can be absorbed as soon as possible and the injured ligament can recover as soon as possible. If the medial collateral ligament of the knee joint is completely ruptured and the stability of the knee joint is damaged, surgical treatment can be performed in this case, and minimally invasive treatment can be performed through arthroscopy to repair the ligament.