Artificial heart-lung machine is an extracorporeal circulatory device used clinically to replace the work of normal heart and lungs, which is combined by oxygenator, blood pump and auxiliary equipment, and so on. 1. Oxygenator: it is an important part of the artificial heart-lung machine, and its main function is to carry out gas exchange, temporarily replacing the function of human lungs. 2. Blood pump: the main function is to simulate the normal human heart pumping blood, artificial heart-lung machine usually has 4~5 blood pumps, each pump has a clear function, the main pump is mainly used to replace the ventricular pulsation function, and the rest of the pumps are used for the operation of the operation field of the blood back suction, the perfusion of the cardiac arrest fluid, ventricular decompression and exhaust, and so on. 3. Auxiliary equipment: including tubes and cannulas, microembolization filters, heat exchange equipment, and vital signs monitoring devices. This equipment is mainly used in extracorporeal circulation for cardiac surgery, major vascular surgery, auxiliary respiration for lung transplantation and auxiliary treatment for acute respiratory failure.