The specific first aid for patients with carbon dioxide poisoning is as follows: 1. Once carbon dioxide poisoning is found, quickly get the poisoned patient out of the poisoned environment and move to a space with good ventilation and air convection; 2. Let the poisoned patient lie flat, undo the clothes, untie the collar and trouser belt, and clean out the dirt in the mouth and nose to ensure a smooth airway; at the same time, pay attention to keeping warm, observe the patient’s state of consciousness, monitor vital signs, and give oxygen, fluids and symptomatic treatment in the hospital; 3. If the patient is found to be in respiratory and cardiac arrest, cardiopulmonary resuscitation should be implemented in a timely manner, with obvious efficacy.