Knee deformity can be corrected by orthotics or surgery. If the children’s knee deformation, generally for the knee inversion or knee valgus, mild patients because of the normal phenomenon of children’s development process, with the child’s growth and development can be self-corrected. If the joint deformity is obvious, orthopedic shoes can be taken to correct it. If the deformation of adult knee is caused by osteoarthritis or rheumatoid arthritis, if the joint space is obviously narrowed, the joint pain is obvious, and the joint activity is obviously limited, you can take the tibial osteotomy orthopedic or knee replacement surgery. Therefore, the deformation of knee joint needs to be treated according to the age and the cause of deformation of knee joint to change the joint shape and force line.