Coarse and fine powder separation device of coal mill

The utility model discloses a coal mill coarse and fine powder separating device which comprises a machine shell, a discharging pipe and a blanking pipe, the discharging pipe is arranged on the top of the machine shell and communicated with an inner cavity of the machine shell, and the blanking pipe is arranged in the center of the machine shell and extends downwards to a grinding area. A blade assembly is arranged at the top of an inner cavity of the machine shell, a separator discharging cone is arranged at the bottom of the blade assembly, a separation assembly is arranged at the bottom of the separator discharging cone, a material pile is arranged at the bottom of the separation assembly, grinding rollers are arranged on the two sides of the material pile, and lining plates are arranged at the bottoms of the grinding rollers. And an air ring is arranged on the outer side of the lining plate. Pulverized coal is further separated by arranging the coarse powder separation cone and the material sealing pipe,