If the torn posterior horn of the meniscus is mild, it can be treated conservatively without surgery; if it is severe enough to prevent normal activities, surgery is usually needed. 1. Conservative treatment: If the scope of posterior meniscus horn tear is small, the symptom only manifests as slight pain in the joint, the symptoms such as knee joint popping or interlocking do not appear, and it does not affect the joint activities, then it can not be operated, and it can be treated with external fixation, such as plaster or knee brace. Reduce activities, pay attention to rest, can take oral non-steroidal anti-inflammatory analgesic drugs, such as diclofenac sodium and so on to relieve pain symptoms. 2. Surgery: If the damage to the posterior horn of the meniscus is more serious, the joint pain is more obvious, unable to move normally, conservative treatment has no obvious effect or can not be treated conservatively, then surgery is needed, through the minimally invasive arthroscopic surgery on the posterior horn of the meniscus tear site for suture, so as to make the integrity of the posterior horn of the meniscus tear and continuity of the recovery, to avoid secondary damage to the articular cartilage or other parts. If posterior horn of meniscus injury occurs, it is recommended to consult a doctor in time and follow the doctor’s instructions for standardized treatment, so as to avoid delaying the condition. All of the above medications should be administered under medical supervision.