There are many different materials for knee replacement, the common one is the surface replacement material, nowadays the surface replacement material is divided into unicompartmental replacement, total knee replacement and patellofemoral joint replacement material, the femoral condyle and tibial plateau are made of metal and cobalt-chromium-molybdenum alloy. The spacer between the femoral condyle and the tibial plateau is polymer polyethylene, and the interface of fixation is also distinguished by the interface of bone cement fixation and the biological interface. Artificial knee arthroplasty is a new technology gradually developed after the successful application of artificial joints in the treatment of knee diseases, which can effectively eliminate advanced knee pain and greatly improve the quality of life of patients.