The patient is lying down, and after general anesthesia, a single-lumen tracheal intubation is performed, iodine and alcohol are used to sterilize the patient, and a sterile surgical sheet is laid. The thoracoscope is entered to observe the intra-thoracic cavity; the skin, subcutaneous and muscular layers are then incised in layers between the mid-axillary and anterior axillary lines on both sides at the deepest part of the thoracic depression, with incisions of approximately 3 cm each. The submuscular layer is freed to the highest point of the thorax, and the guide is used on the right side to enter the thorax from the highest point, without the deepest depression of the thorax, before the pericardium and after the thorax, and through the highest point of the contralateral thorax. After the guide is left in the guide and pulled back from left to right, the guide is connected to the support plate placed from right to left, and the support plate is turned over with the flipper to observe the shape of the thorax, and the finish is satisfactory, and fixed plates are placed on both sides of the support plate. Suture in layers. Surgery is completed.