The parts and components of the dust collector are arranged in the form of side air intake. The ash containing flue gas enters from the side of the bag, and the filtered clean flue gas is discharged from the upper part of the dust collector. With this arrangement, the system resistance is small, and the dust can quickly fall into the ash hopper after ash removal, and the secondary adsorption rate of dust is small. An air flow buffer and current sharing device is set in the flue gas inlet to make some coarse particles in the dusty flue gas settle and slide into the ash hopper after impact, so as to prevent the dust particles from directly impacting the filter bag and damaging the dust removal cloth bag, which can protect the filter bag. Scope of application: it is applicable to the collection of various kinds of powder, such as the dust collection of various production equipment in the chemical industry, food industry, pharmaceutical industry, electronic industry, etc. it can also effectively handle the dust collection of iron and steel, non-ferrous metals, mining industry, various furnaces, as well as the dust collection of various drying, mixing and mixing exhaust gases.