Knee replacement surgery is mainly for severe degenerative osteoarthritis or traumatic osteoarthritis of the knee joint. The cost of knee replacement surgery is mainly in two categories. 1. the cost of the knee prosthesis, which is about 30,000 yuan. 2. the cost of surgery, anesthesia, bed, medicine, etc., which are about 15,000 yuan. So the total cost of one side of the knee replacement is about 45,000 yuan. The local economy, the level of the hospital, and the choice of prosthesis all have more to do with it. Anticoagulation therapy is required for 1 month after knee replacement to prevent deep vein thrombosis. Knee replacement prosthesis has a certain service life, about 15 years on average. Avoiding long distance walking, excessive knee flexion and strenuous exercise can help to reduce wear and tear of the prosthesis and prolong its use.