The principles of first aid for trauma are as follows: 1, establish a holistic awareness: a comprehensive understanding of the injuries, to avoid omissions; 2, first rescue life: such as respiratory arrest, the first cardiopulmonary resuscitation; 3, check the injuries and rapid and effective hemostasis: stop the bleeding through compression, tamponade, bandages, tourniquets and other ways; 4, pay attention to the order of bandaging: first bandage the head, chest, then abdomen, and finally bandage the limbs; 5, pay attention to the fixed The order of fixation: fix the neck first, then fix the limbs; 6, operate quickly and accurately: the action should be light, to prevent injury aggravation; 7, wear personal protective equipment: wear medical gloves, or use gauze, dry towels, handkerchiefs, plastic bags and other alternatives.