The machine adopts the dual end surface mechanical sealing with reliability and durability, mated with the Cooling liquid compatible to the ground material in order to reduce the pollution of ground material, suitable to grind the materials in coating, oil painting printing ind and pesticide industries. It makes the material into aggressiveness and give the strong grind so that the grains reaches the required fineness in short time.The machine is easily operated with reliability and high production efficiency. Depending to different requirements, the different models of machines can satisfy with customers.