The femur is a long and wide bone within the thigh, and the treatment of comminuted femur fracture is related to the fracture site, as follows: 1. If the middle femoral stem is slightly fractured and lightly displaced, it can be treated conservatively, such as bed rest, but the comminuted fracture needs to be treated surgically, which can be incised and reset, fixed with plate screws, and can also be fixed intramedullary; 2. If the femur fracture is near the knee area, it may involve the intra-articular fracture, surgical fixation is required, but the repositioning is very demanding and needs to restore the flatness of the joint surface and the normal structure of the whole femur, otherwise it will affect the mobility of the knee; 3. If the comminuted fracture is in the proximal hip area of the femur, it needs to be incised and repositioned with internal fixation of plate or intramedullary nail, and for special people, such as elderly osteoporosis, the internal fixation is not strong, and joint replacement is needed to replace the shattered femur The broken femur is replaced with an artificial prosthesis. Therefore, after a comminuted femur fracture, braking is required to keep the fracture stable before subsequent treatment, such as repositioning internal fixation or joint replacement.