Inhalation of chlorine gas is not self-recovering. Moderate poisoning may present with coughing, wheezing, choking sensation, sore throat, dry rales on lung auscultation, chest radiograph showing thickened texture, and normal blood gas analysis. Exposure to chlorine gas onset for 2 to 3 hours can be manifested as mild poisoning, and this condition also needs to be observed. Resuscitation measures for chlorine gas poisoning, the onset of chlorine gas poisoning is violent and rapid, so timely and comprehensive effective resuscitation of patients is the key to get patients out of danger, evacuate the scene, get patients out of chlorine-contaminated places as soon as possible, immediately give oxygen flow 4 to 7 liters per minute, give 20% to 30% alcohol wetting if necessary, wash eyes with 2% soda when eyes are irritated, pharyngitis can be inhaled with 2% soda steam, take off clothing, rinse the skin with plenty of water, and until the burning sensation of the skin is reduced.