Using sand belt combined with sand block structure, the melting slag and Burr roller conveying workpieces produced after cold and hot processing can be removed efficiently and quickly, the unique belt mechanism can deal with the Sharp Edge, Burr and chamfering of the inner and outer contour of the workpiece quickly and efficiently. It can not only remove the molten slag but also draw the surface of the workpiece, man-machine interface is easy to operate, digital precise control, can be sand belt and sand block grinding mechanism control, suitable for different workpiece processing requirements abrasive uniform wear, no waste, it is easy and quick to change different abrasives, suitable for carbon steel, stainless steel and other metal materials