Booster pump used on gas supply device

The invention discloses a booster pump used on a gas supply device. The booster pump comprises a pump body, a driving reversing device, a driving compressing device, a driving cylinder tail cover, a compressing cylinder tail cover and a separating plate; the driving reversing device is arranged on the left side of the upper end of the pump body; the driving compressing device is arranged inside the pump body; the driving compressing device and the driving reversing device cooperate for use; the separating plate is arranged in the longitudinal middle of the driving compressing device; the driving cylinder tail cover is arranged on the left side of the pump body; the compressing cylinder tail cover is arranged on the right side of the pump body; and the driving cylinder tail cover and the compressing cylinder tail cover cooperate with the driving compressing device. The booster pump is reasonable in design, convenient to use and high in working efficiency, natural gas is pressurized by the aid of power of compr