This machine frequency conversion speed regulation feed material is suitable for the flat stone material of different size and thickness the straight side and the bottom side and the 45 degree Angle, kicks the foot line to grind, the coarse fine grinding polishing completes once. The plane after polishing is close to the degree of brightness of stone matrix, when adjusting different processing thickness (refer to the digital display table on the front beam for adjustment), it has the advantages of advanced structure, high accuracy, convenient operation, continuous processing of the same thickness, and so on. It is a necessary processing equipment for deep processing of stone.