The four principles of first aid for fracture patients are as follows: First, save life. Many times the trauma is serious and may be life-threatening at any time. Simply stop the bleeding and rehydrate if available in time. Second, dressing the wound. Open fracture timely dressing the wound to reduce the risk of re-contamination of the fracture. In addition, dress the wound to stop bleeding and reduce continued blood loss. Third, proper fixation. Depending on the specific location of the fracture, different methods of fixation can be chosen, using a simple wooden stick to give fixation. If it is a lower limb, the legs can be tied together, and if it is an upper limb, it can be fixed by sticking it to the chest. Fourth, after these preparations are perfected, transfer quickly to the hospital. Transfer to a hospital that can be equipped to handle it for further follow-up treatment, and active treatment will help to save the patient.