Extracorporeal circulation is a very important adjunct in performing cardiac surgery, connecting the upper and lower vena cava through an extracorporeal circulation machine, which acts as a temporary heart to ensure normal blood circulation in the patient’s body. The procedure is as follows: 1. Preoperative preparation, including elimination of infectious diseases, adjustment of the patient’s physique, exclusion of dysfunction of other organs, administration of given drugs and antibiotics, and psychological counseling; 2. Anesthesia, disinfection, and laying of sterile towels; 3. The sternum is opened with an electric knife in the middle of the sternum, and hemostasis is made to expose the pericardium; 4. The pericardium is cut in the middle, and the aorta, pulmonary artery, atria, ventricles, and The aorta, pulmonary artery, atrium, ventricle, upper and lower vena cava and pulmonary veins were checked for normal condition; 5. The cannulae were withdrawn sequentially and the heartbeat was restored.