The principles of first aid for compound injuries are as follows: 1. To save life in the early stage: to ensure the most basic perceptual function of the patient, and to do more work for the functional rehabilitation of the patient after the patient’s condition is stabilized. In the process of compound injury first aid, the first thing is to open the airway and prevent asphyxia; 2. Remove the factors causing injury: reduce the continued trauma. The patient’s limb, let’s say a fracture, should be initially treated; 3. Anti-shock treatment: In the middle of the anti-shock treatment process, each treatment is associated. Early fixation of the fracture helps the smooth progress of resuscitation, while the anti-shock treatment facilitates the rapid recovery of the patient’s perception and the cooperation with the resuscitation work as soon as possible.