Under the action of the centrifugal blower, the dust-containing airflow enters the dust collector from the suction pipe, and the dust is separated and removed by the strong interception effect of the bag filter material inside the machine. The filter bag is vibrated by the pulse cleaning device inside the dust remover, so that the dust adhering to the surface loosely falls off, thereby achieving the cleaning effect. The dust collector of this system is a negative pressure external filter operation mode.