Pleural effusion drainage tube can not be inserted all the time, usually placed 48~72 hours, and then improve the chest X-ray examination, combined with the patient’s general condition, meet the indications for removal of the tube can be removed. Pleural fluid drainage tube is a drainage tube left after closed chest drainage surgery, which is used to export pleural fluid to improve the patient’s symptoms. The indications for its removal are: 48-72 hours after closed chest drainage, observation of drainage fluid less than 50 ml/24h, no gas overflow, chest X-ray shows lung expansion or no air leakage, and the patient has no dyspnea or shortness of breath, then the tube can be considered to be removed. When removing the chest drain, it is still necessary to pay attention to the principle of asepsis, disinfect the wound, remove the sutures, and when removing the tube, the patient is instructed to inhale deeply, hold his breath, quickly remove the drain, close the wound with petroleum jelly gauze, bandage and fix it, the lungs should be auscultated for respiratory sounds before and after the removal of the tube, and after the removal of the tube, pay attention to observing the patient with or without chest tightness and respiratory distress, and preventing air leakage, leakage of fluids and hemorrhage.