Filter cartridge type dust collector

The invention discloses a filter cartridge type dust collector, and belongs to the field of dust collecting devices. The filter cartridge type dust collector comprises a box body, a filtering chamber,an air purifying chamber, a plurality of rotary filter cartridges and pulse purging assemblies. The filtering chamber and the air purifying chamber are both arranged in the box body, the filtering chamber is arranged at the upstream of the air purifying chamber in the air flowing direction, and the filtering chamber and the air purifying chamber are not communicated with each other. The pluralityof rotary filter cartridges are arranged in the filtering chamber side by side, each rotary filter cartridge comprises an inner ring cylinder and an outer wall cylinder which are arranged inside andoutside in a sleeved manner, the inner ring cylinders and the outer wall cylinders are of folded filter material structures, and air simultaneously flows through the inner ring cylinders and the outerwall cylinders and then ent