There are three main purposes of fracture fixation: 1) to reduce local swelling and pain; 2) to maintain the position of fracture repositioning; 3) to promote the healing and repair of fracture. After the fracture, there will be local swelling and pain, and when the limb is moved, the swelling and pain will increase. The fracture may sometimes be displaced, and the doctor will fix it by manipulation. After fixation, the fracture can be kept in a good repositioning position, and the fracture will be in a good position after it grows up, and the impact on the function will be minimal. Local braking fixation between the fracture ends can produce a relatively stable and rapid bone connection, and there are three main purposes of fracture fixation.