The invention discloses a stripping pump unit, which comprises a stripping pump, a gear motor and a gas-liquid separation device, wherein the stripping pump is a cam rotor pump, the outlet of the cam rotor pump is communicated with the inlet of the gas-liquid separation device, the inlet side of the pump body is provided with a reflowing hole, and the reflowing hole is communicated with a reflowing pipeline of the gas-liquid separation device. According to the stripping pump unit disclosed by the invention, the cam rotor pump is adopted as the stripping pump, oil guiding and stripping functions can be realized due to the stronger self-priming capacity of the cam rotor pump; the cam rotor pump can be used as a main pump for oil discharge due to larger flow; only one pump is needed for all operations of discharging oil from an oil tank. The stripping pump unit has the advantages of high integration level, less occupied area, less investment, high operation efficiency and high reliability. The stripping pump unit can be used singly, and can also be combined with other systems for use. The stripping pump unit can be made into a movable unit, so the unit is easy to install and operate.