Meniscus Ⅲ degree tears can be treated conservatively. After acute phase injury there is usually pain and swelling, if there is no joint interlocking, the knee can be fixed with a knee hinge brace for 2-3 weeks, take non-steroidal anti-inflammatory pain medication, such as loxoprofen sodium, strengthen quadriceps strength training, if symptoms no longer occur, conservative treatment and rehabilitation can be continued. If the pain is recurrent or there are symptoms of interlocking after the injury, surgery needs to be considered. In the chronic phase, the general stability meniscus tear is less than 10 mm, which can be treated conservatively first, and if the meniscus injury tear is larger, the meniscus integrity needs to be restored through surgery. The meniscus surgery modality is arthroscopic meniscus suturing or trimming to restore the meniscus flatness and function. Quadriceps strength training should be started as soon as possible after surgery to gradually restore knee flexion and extension range of motion, and weight-bearing exercises should be started eight weeks after surgery.