The hazards of knee arthritis knee pain, joint deformity, limited activities, seriously affecting daily life. If knee arthritis is not treated in time, the condition will gradually develop, resulting in aggravation of joint destruction, wear and tear of articular cartilage, mainly joint pain, especially pain in standing or squatting, and joint stiffness in the morning. With the development of the disease joints will appear inversion deformity, lower limb force line changes, O-shaped legs, serious patients joint flexion and extension activities are obviously limited, seriously affecting daily life and work. Therefore, knee osteoarthritis should be treated as early as possible to slow down the development of the disease, for the end-stage patients through the artificial knee replacement can restore daily life and work.