A linear fracture is a relatively minor fracture in terms of the shape of the fracture line, which is usually undisplaced. The common linear fracture is the skull cap linear fracture, which is a skull fracture of the skull cap that occurs under the action of external forces such as industrial and mining injuries, without displacement, and has a very high incidence in craniocerebral trauma, often combined with intracranial brain parenchyma injury. Etiology: Work and mining injuries occur under the action of external forces, direct violence such as car impact on the calf leads to tibiofibular fracture, indirect violence such as sudden kneeling when the quadriceps muscle contracts violently leading to patellar fracture, cumulative strain injury: such as long-distance marching prone to fracture of the second and third metatarsals. There are many reasons for fractures, attention should be paid to identify and ask the cause, symptomatic treatment, to see if there are other reasons for the cause, pay attention to the timely removal of the wound fixed.