The duration of conservative treatment for posterior horn meniscus tears is related to the patient’s physical condition, the degree of injury and recovery, and usually takes about 1 year. Posterior meniscus horn tear is a common sports trauma of the knee joint, often caused by acute trauma, repeated injury or gradual degeneration. After posterior horn meniscus tear, the blood supply of meniscus is less, so the conservative treatment is a long-term process. If the patient is in good physical condition and the degree of injury is mild, after active and effective conservative treatment, it usually takes about 1 year to recover. After tearing the posterior horn of the meniscus, in the early 72 hours, local cold compresses can be given, bed rest, lower limb elevation, reduce activities, and avoid weight bearing on the knee, which can help to reduce local swelling and facilitate swelling. 72 hours later, hot compresses can be given, using hot towels, warm water bags, etc. Hot compresses can be given, infrared physiotherapy, which can help to improve the local blood circulation and accelerate the healing of the meniscus. Strenuous activities such as running and jumping should be avoided and the use of the knee joint should be minimized during conservative treatment to avoid secondary damage and prolong the recovery time. If a posterior horn meniscus tear is diagnosed, early standardized treatment is recommended to reduce the adverse effects of the disease.