This machine is a kind of dry dedusting. When the dust containing gas enters the lower part of the box from the air duct, the dust accumulates on the surface of the filter bag after being filtered by the cloth bag, while the clean air passes through the filter bag and is collected into the outlet of the double-layer air duct through each compartment of the upper box to be discharged. Due to the continuous work of dust removal, the dust on the surface of the cloth bag will continuously increase, affecting the cleaning effect. At this time, the operator Press the blowback button 2-3 times in each shift, start the blowback machine and transmission mechanism, receive the blowback, blow back each filter bag in turn, make the filter bag bulge rapidly, and then shake off the dust on the filter bag. After repeated blowing, the blowback will stop automatically due to the time relay control. The dust shaken off from the bag will fall into the dust discharge mechanism at the bottom of the dust collector and then be discharged.