1. Use conjointed main drive structure, high output and reliable operation. 2. Concealed centrifugal air current separator, compact structure and small occupation area. 3. The precision of grinding, coarseness and fineness adjustable (60-200mesh), the passing sieve rate is up to 99.9. 4. No sieve, prevent over micro-fine grinding effectively, low temperature ground materials, especially suitable for thermal sensitive materials. 5. Use specialized high strength horniness alloy blade and gear ring with the long useful ring. 6. Patent main bearing water cooling system make grinder operate in long term without stopping and lengthen the useful life of main bearing obviously. 7. Wind charge-in materials, get rid of stone and iron automatically, reducing the equipment failure. 8. Observation window design is convenient for examining the wear and tear situation of grinding chamber parts, reducing the equipment accident. 9. Worm wheel and worm lift cover design makes maintenance convenient and quick.