Posterior horn injury of medial meniscus can be treated with medication, physical therapy and surgery. 1. Medication: Most of the injuries of posterior horn of medial meniscus are caused by strenuous exercise. If the injury is mild, the patient can follow the doctor’s instruction to use glucosamine sulfate capsule to repair the damaged soft tissues, and also can use the medication of activating blood circulation and removing blood stasis to relieve the patient’s pain. 2. Physical therapy: cupping, acupuncture and so on can activate blood circulation and remove blood stasis, improve blood circulation in the medial meniscus area, and relieve tendons and activate collaterals, etc., which is helpful for the treatment of posterior horn of meniscus injury to a certain extent. 3. Surgery: after other treatments are ineffective, arthroscopy can be carried out to do meniscus repair or suture surgery. Posterior meniscus angle injury should pay attention to reduce the amount of exercise, avoid going up and down the stairs, pay attention to joint warmth. If there is any discomfort, consult a doctor promptly.