Sputum extraction device

The invention belongs to the technical field of medical instruments, and discloses a sputum extraction device which comprises a device shell. The negative pressure draw-off pump is fixedly connected with the device shell, the negative pressure draw-off pump is located on the upper surface of the device shell, and the negative pressure draw-off pump communicates with the interior of the device shell; the suction pipeline is fixedly connected with the negative pressure draw-off pump, and the suction pipeline is communicated with the interior of the negative pressure draw-off pump; the installation pipe structure and the suction pipeline are fixedly installed, and the installation pipe structure communicates with the interior of the suction pipeline; and the tooth mouth occlusion structure is fixedly connected with the mounting pipe structure. The oral cavity is supported through the tooth occlusion structure and the lifting mechanism, so that the upper jaw and the lower jaw cannot move, the action of pharyngeal