The time to install the prosthesis after amputation surgery can depend on the specific situation, as short as 3 to 6 months and as long as 6 to 12 months. 1. It needs to depend on the degree of incision damage and late recovery. If the wound heals well after amputation surgery, the prosthesis can be fitted in 3 to 6 months. If the wound is slow to recover, the prosthesis can be fitted after 6 to 12 months. 2. If the upper limb is to be fitted with a prosthesis, it should be fitted as early as possible, choosing to fit a temporary prosthesis when the incision has not yet recovered. Since the chance of success of upper limb prosthesis installation is low, the temporary prosthesis should be installed first, so as to increase the success rate of official prosthesis installation. 3. At the initial stage of prosthesis installation, it is not recommended to do strenuous exercise, and can gradually adapt to the prosthesis. Functional training can be carried out, and the later enhancement of joint flexion and extension muscle training and normal posture drills and so on. The installation of the prosthesis should be based on their own situation to choose the right one for themselves, if they feel uncomfortable after wearing, they should be adjusted in time. Normally, we should strengthen the muscle strength training to prevent muscle atrophy. Also pay attention to actively control the infection, reduce the occurrence of bone necrosis, and pay attention to the residual limb parts of the hygiene, so as not to cause infection.