Children’s arm fracture with steel pins generally do not have sequelae, if the restoration of steel pins in the internal fixation of nerve damage may have sequelae. Children’s arm fracture due to the consideration of bone growth and development problems, if the fracture is severely dislocated, most of the fracture closed reduction steel pin that is Kirschner’s pin internal fixation, generally does not affect the development of the skeleton, and there is basically no postoperative complications, the fracture healing is ideal. However, in the process of internal fixation, the nerves may be damaged, such as partial damage or complete severance of the nerves, resulting in varying degrees of postoperative upper limb sensory and motor function disorders and other sequelae. As children belong to a special group of people, arm fracture pinning still needs to be carried out by pediatric surgeons specializing in pediatric surgery.