The pulverizer is a centrifugal dry classifier with a secondary air inlet and a classification rotor. The design of the classification rotor using the principle of fluid mechanics can generate a forced vortex, generate a powerful centrifugal force field, and obtain a significant classification effect. Separate materials of different fineness and the range of classification can be arbitrarily selected from 100 mesh to 1500 mesh. The complete series of this machine consists of a feeder, a classifier collector, a fan, and a bag filter; it can also be combined with various Supporting crushing units. It is widely used in super-fine grades of various organic and inorganic substances.