An efficient grain unloading operation dust collection device comprises a grain unloading platform, a
conveyor belt, an air draft
system, a dust collection box, a wall body, a foundation pit and a dust collection device, and is characterized in that the wall body is of a vertical structure, the air draft
system is fixedly connected to the bottom of one side of the wall body, the grain unloading platform is arranged below the bottom of the wall body, the
conveyor belt is fixedly connected to the top of the grain unloading platform, the foundation pit is formed between the
conveyor belt and theother side of the wall body, the dust collection device is fixedly mounted in the foundation pit, the dust collection box is fixedly connected to one side, close to the outer side, of the wall body, and the dust collection device comprises a first motor, a connecting shaft, a
crankshaft, a first box body, a shaft sleeve, a support, a rotating wheel, a first air outlet, an air inlet, a filter screen, an
air blower, an installation plate, a discharging port, a blocking wheel, a stirring wheel, a first rotating shaft, a motor case, a second motor, a limiting frame, a connecting block and a feeding hopper. Grains are scattered through the stirring wheel, the
air blower blows out the dust in the grains, and the dust is sucked into the dust collection box through the rotating wheel.