Elderly people on ventilators can be kept alive if there is no other organ failure, ventilator-related complications are well controlled, and ventilator parameters are set appropriately. Elderly people on ventilator usually because of the existence of life-threatening ventilation function abnormality or oxygenation abnormality, such as respiratory muscle fatigue, asthma, chronic obstructive pulmonary disease, intractable hypoxemia, etc., if the oxygenation is satisfactory after the ventilator, hemodynamic stabilization, and the vital signs are stable, it can be life-sustaining all the time. There are many complications after going on the ventilator, such as ventilator-associated lung injury, ventilator-associated pneumonia, respiratory muscle weakness, etc., which can easily jeopardize life. It is recommended to use the ventilator in the elderly under the guidance of a doctor, set the appropriate parameters, retain sputum culture and give antibiotics according to the drug sensitivity to reduce the harm of ventilator-related complications.