For patients after thoracic surgery, clinicians often strongly urge patients to actively perform respiratory function exercises such as active coughing, deep breathing, and balloon blowing to aid in their recovery. For postoperative patients, especially those who have just undergone surgery, they often feel increased pain when performing these respiratory function exercises. So why do doctors still require patients to perform these exercises? Lung surgery is usually performed under general anesthesia with one-lung ventilation. If the sputum is not coughed out through active coughing and respiratory exercises after surgery, it may block the tracheobronchial tubes and lead to partial or even partial atelectasis of the lung tissue; in addition, the accumulation of sputum in the lung can lead to serious lung infections and even affect the healing of the upper lung tissue. In addition, the accumulation of sputum in the lung can lead to serious lung infection and even affect the healing of the upper cut edge of the lung tissue, thus affecting the patient’s recovery. An important step in the surgical procedure of TV thoracoscopy for spontaneous pneumothorax is pleural friction fixation in order to form loose membranous adhesions between the dirty wall layer pleura after surgery to reduce the possibility of postoperative recurrence. However, in order to form adhesions, the primary prerequisite is that the dirty wall pleura is able to fit together, and only active respiratory function exercises can reopen the lung tissue on the operated side to achieve this effect; and the inflammatory response of the wall pleura after pleural friction is often most severe within the first 3 days, which is also the best time to form pleural adhesions. In addition, postoperative respiratory function exercise does aggravate postoperative pain to some extent, but the better the respiratory function exercise effect, the better the lung tissue reopening, the sooner the closed chest drain can be removed after surgery, and the existence of closed chest drain is the main cause of postoperative pain, the so-called “long pain is better than short pain”. To sum up, whether it is thoracoscopic surgery or conventional open-heart surgery, patients should not only actively carry out respiratory function exercise, but also carry out it as early as possible, so that the lung tissue on the operated side can be reopened in the shortest possible time, and only in this way can we ensure satisfactory results after surgery and minimize the possibility of postoperative recurrence. According to our statistics, the better the postoperative cooperation, the better the lung tissue reopening, and the shorter the postoperative retention of closed chest drainage tube, the lower the postoperative recurrence rate.