The invention discloses a filter barrel mounting structure used on a small pulse dust collector. The filter barrel mounting structure used on the small pulse dust collector comprises a dust collector porous plate, wherein a limiting plate is welded under the dust collector porous plate; mounting positions for placing tracks are reserved at two ends and in the middle of the limiting plate and are welded under the dust collector porous plate; a sealing ring and a bolt which are in butt joint with a filter cartridge are welded under the dust collector porous plate; filter barrel assembling holes are formed in each pressing plate; and the pressing plates slide on the tracks in a matched manner. The limiting plate limits the mounting positions of the pressing plates, and two filter barrel assembling holes are formed in each pressing plate. The filter barrel mounting structure is provided with the two tracks, and the two pressing plates and the tracks are mounted in a matched manner. According to the technical scheme, the filter barrel mounting structure used on the small pulse dust collector is simple in structure, when required to be changed, filter barrels can be easily and conveniently disassembled and assembled, time and labor are saved, and working efficiency is improved.