The main treatment method for tension pneumothorax is closed chest drainage. After closed chest drainage with a water seal bottle, the gas in the chest cavity forms a negative pressure because the pressure is higher than the outside world, so the gas in the chest cavity will flow into the water seal bottle through closed drainage. If the patient coughs, bubbles will be produced. As the gas is gradually discharged, the patient’s symptoms of pulmonary atelectasis are gradually relieved, and the patient’s cough, cyanosis, chest pain and other symptoms are gradually reduced. In the emergency treatment of life-threatening tension pneumothorax, if there is no medical condition or in the scene of rescue, a thick needle can be inserted into the pleural cavity quickly, which can achieve temporary relief of pressure and alleviate symptoms. Or use a thick injection needle, with a needle and connected to a rubber glove, cut small mouth at the end of the glove, after the needle inserted into the pleural cavity, because the high pressure gas can be quickly discharged from the small mouth, to reach the negative pressure when the finger sleeve membrane may collapse, the small mouth closed, so that the outside air can not enter, this is a temporary emergency measures, after this still need to perform closed drainage of the chest cavity.