Automobile vacuum pump drainage mechanism and automobile

The invention discloses an automobile vacuum pump drainage mechanism and an automobile. The automobile vacuum pump drainage mechanism comprises a vacuum pump, a drainer, a connecting pipe and a push rod. Two ends of the connecting pipe are respectively communicated with an air outlet of the vacuum pump and an air inlet of the drainer. The vacuum pump comprises a shell, a rotor and a driving part, the rotor and the driving part are both arranged in the shell, and the driving part is used for driving the rotor to rotate relative to the shell. A guide rod is arranged at one end of the push rod, and a first spiral groove, a first groove and a second groove are formed in the inner side wall of the rotor. Rotation of the rotor can link the guide rod to move between the first groove and the second groove through the first spiral groove so as to link the push rod to move in the axis direction of the rotor relative to the shell. A sealing piece is arranged at the other end of the push rod and is arranged in the cavity