The bag filter used in the foundry produced by Hebei Feixiang Environmental Protection Equipment Co., Ltd. is equipped with electronic pulse back blowing dust cleaning technology, which has good dust cleaning effect and can achieve online dust cleaning. This equipment is equipped with an intelligent dust cleaning device, offline and pressure difference control design, realizing multi-channel machine room back blowing dust cleaning, and providing timed and constant pressure control dust cleaning methods, energy-saving and environmentally friendly. The inlet of the bag filter equipment is equipped with a flow inclined baffle. With the help of cyclone guidance and baffle blocking, most of the dust directly falls into the ash hopper, reducing the filtration pressure of the filter material and extending the service life of the filter bag.