Safety negative-pressure oral cavity nursing device

The utility model discloses a negative-pressure oral cavity nursing device, which comprises a hollow dual-cavity handle, a sponge, a hair brush cleaning head, an extruding nursing liquid sag and a negative-pressure suction extension pipe, wherein the sponge and the a hair brush cleaning head are arranged on the top of the handle; the extruding nursing liquid sag and the negative-pressure suction extension pipe are arranged on the tail part of the handle; in hollow dual cavities of the handle, one cavity is taken as an injection oral cavity nursing liquid cavity which is communicated with the extruding nursing liquid sag; the extruding nursing liquid sag is extruded, a nursing liquid is poured out of an outlet at the top end of the handle, and the cleaning head is full of the nursing liquid, so that oral cavity nursing can be performed; and the other cavity is a negative-pressure suction cavity, and the nursing liquid, secretions and small-block filth in the oral cavity can be sucked by controlling a negative-pressure control hole in an oral cavity nursing process after a negative pressure is connected. When the negative-pressure oral cavity nursing device is applied to oral cavity nursing, the nursing liquid can be extruded inwardly as required without replacing a cleaning cotton ball, operation is easier and more convenient, operation time is saved, negative-pressure suction in the oral cavity can be performed at any time, sewage remaining is reduced, and safety is enhanced.