Trauma is the most common emergency. Various types of trauma can be caused by traffic accidents, injuries from falling from heights, mutual collisions caused by excessive sports, encounters with violence and inadvertent collisions and falls in daily life. For skin bleeding with relatively small amount of bleeding, sterile gauze can be used to stop the bleeding after compression and bandaging. In the absence of tools, the pulsating arterial vessel can be found at the upper end of the bleeding wound, i.e., the proximal end, and the vessel can be compressed with fingers or palms on the bone where it is located to stop bleeding. For bleeding from the extremities, a tourniquet or towel or handkerchief can generally be used, tied at the proximal end and relaxed for 2 minutes for 1 hour. If there is too much bleeding or already have shock, should first be transferred to the patient after transfusion and rehydration at the scene. For craniocerebral injuries should be cleared of vomit and blood clots in the casualty’s mouth, head to the side, pull out the tongue to prevent the tongue from falling back and vomit regurgitating into the trachea causing asphyxia. If blood flows out along the nasal cavity and ear canal, do not block it with cotton balls, gauze or other items to avoid blood reflux and intracranial hypertension. The patient’s sanity, breathing and pulse must be closely monitored during the transfer. For cervical medullary injury pain increases when moving, which is more suggestive of a cervical medullary injury. The key to first aid is to immediately use a cervical brace. If there is no cervical brace for a while, a temporary cervical brace can be made of auxiliary materials, cardboard and plastic plates to fix the neck, and do not swing the head from side to side. For spinal fracture extrusion, the fracture occurs due to excessive flexion of the spine, or direct external force. Improper handling can immediately cause injury to the spinal cord in the spinal canal and paralysis of the limbs below the damaged area. Proper handling should be done by 3-4 people flattening the casualty on the board and then fixing the body with bandages.