First, functional compensation Second, the appearance of compensation The history of the development of China’s prosthetic limbs: After 1979, with the opening up of the world, the introduction of many international advanced level of prosthetic structure and assembly process, so that China’s prosthetic industry has a new leap, specifically in the following areas: 1, the structure of the prosthetic limbs, the renewal of the type (1) Bin ligament bearing calf prosthesis; (2) full contact calf (3) the development of skeletal thigh prosthesis; (4) the successful development of polyurethane prosthetic foot. 2, prosthetic acceptor cavity material process improvement Traditional prosthetic acceptor cavity is made of leather, aluminum, wood, etc., it is difficult to fit with the residual limb, the appearance is not beautiful. In recent years, there has been a major breakthrough in technology and materials. Generally adopted a scientific method of taking the type, in the repaired plaster Yang type using vacuum molding process, the material is used acrylic resin or unsaturated polyester, polyester fiber and glass fiber reinforced, due to the application of this process and materials to create advanced full contact prosthesis. 3, the scientific prosthetic assembly tools In recent years, the introduction of West Germany’s load-bearing take the type of frame, dynamic alignment instrument, assembly instrument. Domestic also developed the “thigh selector”, “lower limb alignment adjuster” and so on. Under the guidance of advanced assembly theory, the use of special equipment, the scientific assembly of prosthetic limbs has taken a welcome step forward. 4, towards comprehensive rehabilitation: fitting prosthesis is only part of the rehabilitation of amputees, in recent years, not only in the theoretical unification of understanding, and many prosthetic production units opened more rehabilitation clinics, physical therapy, physical therapy, functional training and other projects, with the assembly of prosthesis. Various hospitals have also set up prosthetic orthopedic departments one after another, which takes the comprehensive rehabilitation of amputees a big step forward, so that the function of prostheses can be better played. The inclusion of prosthetics in the scope of comprehensive rehabilitation should be said to be a major change in the concept of prosthetics.