Boron carbide powder sorting device

The invention relates to the field of boron carbide production, in particular to a boron carbide powder sorting device which comprises a cylindrical sorting device. A grinding device and a filtering device are arranged in the sorting device, an annular feed inlet is arranged at the top of the sorting device, a driving cavity of the grinding device is arranged in the middle of the feed inlet, connecting plates connected with the inner wall of the sorting device are uniformly distributed on the periphery of the driving cavity, a driving motor capable of lifting up and down is arranged in the driving cavity, an output shaft of the driving motor vertically downwards penetrates through the bottom of the driving cavity and extends into the sorting device, and the grinding device is arranged at the end part, extending into the sorting device, of the output shaft. The grinding device is arranged at the upper end of an upper layer filtering mechanism, the lower portion of a lower layer filtering mechanism is provided