Rubber apron shot blasting machine works is to add positions in the clean-up required number of artifacts, the door closed, the machine starts, the workpiece is driven drum, began to turn, while high-speed impeller fan beam formed projectiles thrown evenly against the workpiece surface, so as to achieve clear objectives. Sand shot and thrown from the track on the hole, into the bottom of the screw conveyor, the conveyor by the screw into the hoist, the hoist mentioned separator for separation. Dust and gas from the suction fan to the dust filter, the changes to clean air, discharged into the atmosphere, the dust through the air cleaning filter into the bottom of the dust box, the user can be regularly cleared. Waste sand by the waste pipe out, the user can reuse. Pill-sand mixture from the tube back into the room recall the body, to be separated before recycling separation. Impeller arrangement through the computer three-dimensional dynamic simulation, all the layout point of view, the location determined by computer design. Take care all need to clean the workpiece, based on minimizing the empty projectile throwing, thus maximizing the utilization of the projectile, reducing the need for clean room protective wear plate.