Dust removal system of pulverizer

The utility model discloses a pulverizer dust removal system which comprises a pulverizer and a dust remover, the pulverizer comprises a pulverizer body and a belt pulley transmission device arranged outside the pulverizer body, and a belt protective cover is arranged outside the belt pulley transmission device. The belt protective cover is provided with at least one dust collection hole communicated with an inner cavity of the belt protective cover, and the dust collection hole is connected with the dust remover through a dust collection pipeline. Dust generated by the belt pulley transmission device is captured by adopting negative pressure, so that rubber dust can be prevented from flying out of the belt protective cover to pollute crushed products; meanwhile, due to the air draft effect of the dust catching device, cold air outside the belt protective cover is sucked into the belt protective cover through the heat dissipation holes, hot air generated by mechanical friction is sucked away, flowing of the a