In modern clinical medicine, ventilator, as an effective means to artificially replace the function of spontaneous ventilation, has been widely used in respiratory failure caused by various reasons, anesthesia respiratory management during major surgery, respiratory support treatment and emergency resuscitation, and occupies a very important position in the field of modern medicine. Ventilator is a kind of vital medical equipment that can prevent and treat respiratory failure, reduce complications, save and prolong patients' lives.