Intramedullary nail fixation is a fixation method mainly used for long tubular bone fractures. Because it is interlocking fixation, the fixation is relatively firm, and after fixation, the broken end of the fracture is allowed to have slight movement, which can stimulate the growth of the broken end of the fracture callus. Therefore, interlocking nail internal fixation is mainly for patients with long tubular bone fractures. If there is obvious displacement of the broken end of the fracture, intramedullary nail internal fixation can be performed, and intramedullary nail is inserted into the pulp cavity, so as to play a role of support and fixation, which is a more commonly used internal fixation method in clinical practice.