Magnetic coupling transmission type sputum suction device

The invention relates to a magnetic coupling transmission type sputum suction device, which comprises a control unit and a sputum suction unit. The sputum suction unit comprises a shell which comprises an upper shell and a lower shell, the upper shell and the lower shell jointly form a closed space, and front and rear joints of the upper shell and the lower shell are provided with a trachea cannula connection port and a closed sputum suction tube connection port respectively. A base is arranged at the bottom of the lower shell, the shell is internally partitioned into two spaces namely a braking area and a transmission area by a partition plate arranged on the base. A mounting plate is arranged on one side of the base, the transmission area is formed between the partition plate and the mounting plate while the other area is the braking area, a motor for providing kinetic energy is arranged in the braking area, a transmission component is arranged in the transmission area, the motor andthe transmission compone