Meniscus and posterior cruciate ligament injuries in the elderly can be treated with bed rest, external immobilization, as well as medication and surgery if they are caused by trauma. If they are caused by joint degeneration, they can be treated with rest, oral medication, and surgery. Elderly people with trauma-induced joint pain meniscus and posterior cruciate ligament injuries should pay attention to bed rest, can use plaster cast for external immobilization, oral anti-inflammatory and analgesic medication to relieve pain as prescribed by the doctor, such as diclofenac sodium, celecoxib and so on. After a period of treatment, if the joint is still unstable and painful to walk, it can also be treated by surgery, such as posterior cruciate ligament reconstruction. If the meniscus and posterior cruciate ligament injuries are caused by joint degeneration, the elderly should pay attention to proper rest, avoid heavy labor, and can be treated by oral anti-inflammatory and analgesic drugs to relieve pain and intra-articular injection of sodium vitrate. If the degeneration of the joint is serious and the pain and activity are still limited after treatment, it can also be treated by surgery, such as artificial knee replacement. Elderly people with symptoms of meniscus and posterior cruciate ligament injuries are advised to go to the hospital, check and improve the examination, clarify the cause of the disease and receive regular treatment.