External fixation braces are usually used to fix the fracture end of a traumatic fracture. Its advantage is that it can avoid damaging the soft tissues of the fracture end, especially the periosteum, and thus can effectively prevent the lack of blood circulation of the fracture end, which may lead to slow growth of the bone in the later stage, or even bone non-union, osteonecrosis, etc. Therefore, it is especially suitable for the external fixation of some closed reduction of the fracture, or used for the external fixation of some open fracture, where the damage to the soft tissues around the fracture is more serious, and it is not suitable for internal fixation in this case. In this case, it is most suitable to use external fixation stent. The disadvantage is that the external fixation bracket generally must be in the limb or the upper and lower ends of the fracture must be drilled outside the skin, and then be able to fix the fracture end, so in the usual care of the skin wounds often in the wound above the frequent change of disinfection, which can easily lead to infection of such wounds, in addition, for the usual work and life is not very convenient because of the external fixation of the bracket is usually a very bad influence on the appearance, and it is very easy to touch, resulting in local wounds. It is easy to touch, resulting in localized wound pain.