This device makes use of the relative motion of moved fluted disc and fixed fluted disc to grind materials by the impact and friction of cogs and the materials impact on each other. The grinded materials will enter into collector automatically by the action of rotating centrifugal force; and the dust will be filtered and discharged by cloth-bag. This device is designed with the “GMP” standard and is made of stainless steel. And no dust flying during producing. Currently, it has achieved international advanced level.