The application discloses an automatic pressure regulating negative pressure suction device with automatic humidification function, which comprises a tracheal
catheter, a closed
sputum suction tube connected to the
tail end of the tracheal
catheter, a humidification tube connected to a humidification tube port on the closed
sputum suction tube, an infusion device connected to the upper end of the humidification tube, sterile humidification liquid connected to the infusion device, a quantitative
injection device additionally arranged outside a Murphy dropper of the infusion device, and a pressure pump provided with a volume sensor and a closed air bag wrapping the Murphy dropper, wherein the
tail end of the closed
sputum suction tube is connected to a disposable negative pressure suction
liquid storage bottle through a suction device leather strap, and another connecting port of the negative pressure suction
bottle is connected to a negative pressure suction pressure regulating table. According to the application, pressure modules are selected according to different suction liquids (sputum, bile,
intestinal fluid,
cerebrospinal fluid, etc.), a standard negative pressure value range is adjusted by one key, and the application is convenient to use. In addition, the automatic humidification can be performed on thick sputum for the sputum suction operation, the sputum is made to be thin, and the suction is facilitated.