Large area burns are often caused in daily work and life, especially in industrial and mining accidents and transportation accidents, which can also cause a large number of people to be burned. Large burns Ⅱ, Ⅲ degree burns area accounted for more than 30% of the body surface area, usually need timely treatment and evacuation. A, the scene of first aid 1, should quickly take off the fire clothes, or lie down on the ground, slowly roll to extinguish the fire. Do not stand up and shout or run. 2, chemical burns should be immediately removed from the clothes with chemicals, and a large amount of water to flush the trauma for at least 30 minutes. 3, the critically injured should be immediately artificial respiration and chest cardiac massage for respiratory and cardiac arrest. With hemorrhage to stop bleeding, combined with fractures to simple fixation. 4, inhalation injury is common in the confined environment of the head and face burn injuries. Severe inhalation injury with airway obstruction should be performed several 15 gauge injection needle through the cricothyroid membrane puncture, in order to temporarily lift the airway obstruction. 5, remove the body rings, hands, belts, boots and other restrictive ornaments, to avoid limb edema, difficult to remove, or affect the distal blood flow, or restrict breathing. 6.The trauma surface should be wrapped with clean sheets and clothes in time to protect the trauma surface and maintain body temperature to avoid contamination and hypothermia. Follow-up treatment 1. Initially estimate the area and depth of burns, whether there are combined injuries and combined poisoning, and fill out a simple medical record. 2.Analgesic sedation Give dulcolax, morphine (with respiratory burns and cranio-cerebral trauma is contraindicated) to relieve pain or use luminal, Valium sedation. 3, moderate to severe inhalation injury, especially with deep head and facial burns, should strive to appear before the obvious airway obstruction, endotracheal intubation or tracheotomy. To long-distance evacuation, more should be in the evacuation before the establishment of an artificial airway. 4, for large area burns casualties, should strive for time priority transfer to nearby medical units to start anti-shock treatment; gastrointestinal dysfunction (vicious habits, vomiting) and those who have shock symptoms, should quickly create conditions to intravenous rehydration. 5.Burn area of 30-49% of the casualty, if you can be sent to the designated hospital within 8 hours is better; or in the intravenous replenishment of fluids at the same time choose a smooth means of transport transfer. 6, burns more than 50% of the area of more than 70% of the casualties, in general, should be in place anti-shock, after 48 hours after the injury and then evacuation. If the local medical conditions are too poor or too many casualties, should strive to enter a large number of balance at the same time quickly using air transport to specialist hospitals. 7, moderate and severe respiratory burns, should be tracheotomy or cricothyroid membrane puncture to prevent asphyxiation; burn area of more than 30% of the casualty should be retained urinary catheter; in addition, in order to prevent infection, should also be based on the injury, respectively, cast antimicrobial agents, penicillin should be routinely applied (allergy test negative), in order to prevent hemolytic streptococcal infection. 8, evacuation should carry the necessary first aid equipment and drugs, such as tracheotomy kits, various first aid drugs, oxygen, etc.. Avoid the use of hibernation agents during evacuation to prevent postural shock during evacuation.