The invention provides a portable container automatic unloading device, and relates to the technical field of unloading, the portable container automatic unloading device comprises a vehicle body and a storage container, the storage container is fixedly mounted on the vehicle body, the vehicle body is provided with an unloading mechanism facilitating rapid unloading of the storage container, and the vehicle body is provided with a material control mechanism facilitating
slurry unloading control; the discharging mechanism comprises a discharging shell, a
material storage bag and an
air pump, and the material control mechanism comprises a side plate, a rack and an L-shaped connecting rod. Through cooperation of the
air pump, the discharging shell and the storage bag, air is injected into the discharging shell through the
air pump, the discharging shell is extruded to inject
slurry into a
pile, continuous discharging is achieved, discharging is extruded through the storage bag, separation of the
slurry can be effectively reduced, the slurry flows more stably in the process that the storage bag is slowly extruded by the air, and the discharging efficiency is improved. The separation of aggregate and
cement paste is reduced, so that the overall quality of the paste is improved.