Construction engineering garbage crushing device

The utility model discloses a construction engineering garbage crushing device which comprises a bottom plate, and the top of the bottom plate is fixedly connected with a crushing device body. When the crushing device body works, the door plate blocks the discharging opening of the crushing device body, garbage fragments in the crushing device body cannot be splashed out from the discharging opening, when the discharging opening needs to be opened, the motor is started, the motor drives the disc to rotate by 180 degrees, and the disc drives the transmission column to move during rotation; the transmission column drives the vertical plate and the toothed plate to move towards the left side, the toothed plate drives the gear to rotate, the gear drives the rotating shaft to rotate, the rotating shaft drives the L-shaped plate to rotate, the L-shaped plate drives the door plate to rotate, the door plate is separated from the crushing device body after rotating, and the discharging port of the crushing device body