Pneumothorax closed drainage two days after there is still gas is a normal phenomenon, continue closed chest drainage, and good care, and actively treat the primary disease. After closed chest drainage for pneumothorax, the gas in the chest cavity can be discharged by drainage, if there are still gas bubbles discharged from the closed chest drainage bottle after 1 week of treatment, surgery should be considered; during the drainage period, attention should be paid to observing the closure of the drainage port, avoiding pulling on the drainage tube and preventing the occurrence of suture cracking and bleeding. Patients should pay attention to strengthen the nutrition, eat more high protein food, avoid strenuous activities. Pneumothorax is mainly due to alveolar rupture, usually slow obstructive pulmonary alveolar rupture, improper surgical operation and chest trauma, etc., can cause alveolar rupture. Patients should actively treat the primary disease to avoid exacerbation of the disease, causing recurrent pneumothorax. After the closed drainage of pneumothorax, patients should do a good job of nursing, the emergence of discomfort timely treatment.