Bone traction is a common treatment in orthopedics and serves the same purpose as a cast or splint, which is to maintain the fracture break from running to other locations. Because some patients to the hospital after the use of traction or skin traction, or play bone traction, and bone traction is to put the gristle pin through the adjacent part of the bone, plus traction weight to pull the fracture site, there are several roles: 1, because the fracture broken end broken like a knife, the fracture broken end is relatively well fixed, will damage the surrounding muscles, nerves or blood vessels, causing unnecessary secondary injury, so bone traction Bone traction is very important; 2. Bone traction can pull apart the fracture end and reduce local bleeding after pulling apart. Because the vast majority of fractures require surgical treatment, creating a very good condition for surgery. And after the relative local stability of the bone break during surgery, it will greatly improve the convenience of surgical operation, which is very important for future limb function recovery. Therefore, for comminuted fractures, fractures with displacement, and severe fractures, bone traction is a very necessary treatment measure.