Ventilator is a kind of equipment that can replace manual automatic breathing. It is divided into invasive ventilator and non-invasive ventilator, which need to be used correctly by professional doctors or nurses. 1. How to use the invasive ventilator: first connect the power supply of the ventilator and the tracheal tube, then connect the mainframe with the test tube for self-checking, then filter the screws and humidifying membrane of the ventilator, and adjust the ventilation mode and parameters according to the doctor’s requirements and conditions, mainly used for tracheal intubation, tracheotomy, respiratory failure, and patients after major surgery. 2. The use of non-invasive ventilator: first of all, we should do the relevant examination, exclude the airway secretion, to ensure that the airway is smooth, the airway is not smooth, can not be non-invasive ventilation, there is a cough, swallowing difficulties in the patient, can not be used. The noninvasive ventilator and face can be operated by a noninvasive mask that is closely connected to the face to adjust the pressure. The correct use of the ventilator should be mastered, and the patient’s vital signs should be observed at all times during use.