First aid care points for multiple injuries: 1. closely observe the patient’s vital signs, if there is respiratory and cardiac arrest, the doctor should be notified immediately to give chest cardiac compressions and artificial respiration and other cardiopulmonary resuscitation measures on the spot. 2. pay attention to the condition of the respiratory tract, if there is vomitus or oral bleeding caused by skull base fracture, the object in the mouth should be sucked out with an aspirator in a timely manner to avoid respiratory difficulties due to accidental aspiration. 3. 3, the bleeding place dressing hemostatic treatment, wound is usually based on pressure dressing, if the injury is large blood vessels must be in the proximal limb of the wound with a ligature to stop bleeding. 4, immediately given to establish good venous access, if shock, to establish 2-3 venous access to fast rehydration, blood transfusion and other treatment to correct shock. 5, the fracture or injury place of fixation, if the cervical or lumbar spine If the fracture is in the cervical or lumbar spine, the fracture must be externally fixed with a cervical or lumbar circumference. If it is a fracture of an extremity, external fixation with a splint or cast can be used.