Open pressurized sand blasting machine is also called Sand Blasting Pot, with power, velocity and flow of compressed air, all kinds of abrasive jet to the metal surface, spray into the surface of the metal abrasive impact grinding on the metal surface, remove impurities and surface oxide, the surface area increases, improve the adhesion of the coating and the coating the quality of the structure in the body can be removed at the same time in stress. In the working state, the container of compressed air and mixed abrasive jet side, so that the compressed air can be fully utilized, air flow and abrasive flow is easy to adjust, can get ideal mixing, energy and abrasive consumption, high grinding efficiency.