Sulfur dioxide poisoning must be immediately detached from the poisoned environment, keep the airway open, etc., immediately sent to the hospital, in the hospital can be taken to the respirator oxygen, drug control, etc.. 1. On-site first aid measures (1) Immediately remove contaminated clothing, remove skin surface pollutants. (2) Keep the airway open and remove vomit and mucus from the mouth and nose. (3) Immediately send to the hospital, or call 120 emergency. 2. First aid measures in hospital (1) Correct hypoxia, give high-flow oxygen, nebulized inhalation to humidify the airway. If the patient’s condition is serious, hypoxemia can not be corrected, or severe pulmonary edema, can be used under the respiratory machine mechanical ventilation end-expiratory positive pressure oxygen. (2) Hormonal drugs such as dexamethasone and hydrocortisone can be used for severe inflammatory response. (3) Correct electrolyte disorders, replenish blood volume, and ensure that the hourly urine output reaches 30 ml. (4) If the respiratory secretion increases, it should be sucked out in time. (5) A certain proportion of aminophylline, saline, dexamethasone and gentamicin can be inhaled by ultrasonic nebulization to reduce the irritation suffered by the respiratory mucosa. (6) Medications such as erythromycin ophthalmic ointment may be used if ocular conjunctival contact with the poison is present. When there are manifestations of sulfur dioxide poisoning such as dyspnea, chest tightness and shortness of breath, cyanosis, and skin flushing, it is recommended to go to the hospital in time.