1, according to the conditions of the residual limb correct choice of acceptor cavity and prosthetic suspension method, do not blindly pursue suction acceptor cavity: residual limb is too short; too much subcutaneous soft tissue, poor venous return are not suitable for the use of suction thigh prosthesis, if forced to use, it will often fall off or cause soft tissue swelling at the end of the residual limb. 2, according to the age, walking needs of the correct choice of knee function and materials, do not blindly pursue high-priced, imported prosthetic parts: the elderly, frail people should choose light prosthetic parts, walking in the need for reliable stability. To prevent the prosthesis suddenly hit the soft leg, fall, it is appropriate to choose the knee joint with hand lock or knee joint with weight-bearing self-locking; children due to growth and development needs should choose skeletal thigh prosthesis in order to extend the prosthesis every year; thigh prosthesis with step-following performance of the knee joint, can automatically adjust the speed of the lower leg swing according to the need to walk fast and slow, but the weight of such knee joints are larger, are foreign imports of components, expensive, mainly for young people need to walk fast. Mainly suitable for young people who need to walk quickly. Here in passing to remind thigh amputees, you should clearly understand what kind of knee you are fitted with, should have the functional characteristics, in use whether all have been. 3, according to the weight to choose the appropriate prosthetic foot or single-axis ankle joint of the rear cushion spring (mostly made of rubber): small weight should choose the fixed ankle soft heel foot in the soft heel or single-axis ankle in the soft rear cushion spring of, otherwise it is easy to cause walking in the sudden hit soft leg and heel landing when the toe swing. 4, pay attention to the impact of the surrounding environment on the use of thigh prosthesis: the current thigh prosthesis can help amputees walk on flat roads, can go up and down stairs, up and down less steep slopes. Wearing thigh prosthesis is also difficult to go up and down steep slopes, so most of the limb wearers living in mountainous areas prefer to use sturdy double crutches instead of prosthetics.