the machine is improved one by the single bean grinding machine with adopting the bridge type structure.the movement structure is made by double side and linear guide,it has strong and film body to process the curve line by adjusting the head cross direction,the down cutting head speed is adopted by inverter control,it can process the straight line by rotated the machine head to be 90 degree.It is the most practical machine to process in stone market with high efficiency,fast process,good stable and great precision.