Fast linear liquid injection machine

The invention relates to a rapid linear liquid injection machine which comprises a feeding device, a liquid injection device, a standing device and a discharging device which are sequentially arranged in the first direction, the discharging device comprises a discharging platform, and a retainer cup discharging station and a battery discharging station are sequentially arranged on the discharging platform; the discharging mechanism is erected above the discharging platform, and the discharging mechanism comprises a retainer cup discharging assembly used for taking out retainer cups and a battery discharging assembly used for taking out batteries loaded on the supporting plate; the cleaning assembly is arranged at the retainer cup discharging station, and the retainer cup discharging assembly can move in the vertical direction so that the taken-out retainer cups can stretch into the cleaning assembly to be cleaned; and the jig backflow mechanism is arranged below the discharging platform and is used for convey