The meniscus, also known as the meniscus, is located in the knee joint and has a medial meniscus and a lateral meniscus, which is the fibrous cartilage in the knee joint and has the function of stabilizing the joint. Meniscus injury is mainly due to knee sprains or long-term strenuous exercise leading to meniscus tear, tear, trauma impact is a common cause of meniscus injury, which can cause impaired knee activities and localized obvious swelling, pain. Middle-aged and elderly patients are due to bone and joint degeneration, meniscus repeated wear and tear can also cause obvious damage, through the knee joint radiography or magnetic resonance imaging can be clearly diagnosed. Patients will manifest obvious local pain, pressure pain, swelling and lower extremity knee joint activity limitation or obstacle, need to be actively treated, otherwise it will affect the normal activities, accelerate the degeneration of the joints caused by osteoarthritis.