The special signs of a complete fracture are: first, local deformity, that is, the limb shape is significantly different from normal. Second, there is local paradoxical activity, the limb normally can not reach the range, after the fracture local loss of continuity can be reached. Third, bone rubbing sound and bone rubbing sensation, which is mainly judged by the doctor’s examination. If one of the above three signs is present, it can be determined as a complete fracture, however, further X-ray examination is still needed, which can determine the specific location of the fracture, the specific degree of displacement and the degree of comminution. If the fracture is in good position, it should be fixed in a cast or splint. If the fracture is significantly displaced, prompt manipulation to assist with cast or splint fixation is indicated. If manipulation does not maintain good functional repositioning, or if it interferes with fracture healing, surgical repositioning and internal fixation should be considered.