Cleaning bag filter bag filter cleaning it is widely used in steel mills, smelters, cement, carbon black plants, power plants and other enterprises smelting, crushing, screening and soot produced by combustion purification and recycling. Blowback bag filter points positive pressure (also known as push-in) and negative pressure (also known as inhaled), described in this specification by negative pressure. Dusty gas under negative pressure from the inlet pipe into the lower hopper, in the air inlet of the front spoiler is provided, coarse dust and carom by gravity into the hopper, fine particles of dust through bag filter after adsorption on the inner wall of the bag, the purified gas through the baghouse, the switching valve through the discharge pipe suction fan through the top of the device, and then the exhaust pipe into the atmosphere. Dust bag attached increasing resistance rises a predetermined value, that is the beginning of cleaning, equipment cleaning methods rely on single-chamber anti-hair way, when the anti-hair through the valve, close the exhaust pipe, anti-hair open tube, single cut chamber exhaust, because the equipment inlet duct of each chamber is the same, and are in a negative state, the negative pressure due to the pumping action of the next room, so that air is drawn into the chamber through the anti-hair bag tube through the filter bag , air from the outside into the inside of the bag, the hopper and the chamber adjoining the suction inlet tube discharge, when the bag is sucked deflated, the interior of the bag and shake off the dust accompanied by the sink to sink lower hopper to complete the single chamber cleaning, cleaning rest rooms under the control of the actuator, perform cleaning in the same order, in addition to a certain value, the cleaning stops.