The invention discloses a cartridge dust collector, and relates to the field of dust removing equipment. The cartridge dust collector comprises a rack, wherein the rack is provided with a box body and an air storage pipe; an air inlet and an air outlet are formed in the top of the box body; a first step plate and a second step plate are arranged in the box body; the first step plate divides the box body into a first space and a second space; a plurality of filter cartridges are arranged in the box body; an open end is arranged in one end of each filter cartridge and a closed end is arranged at the other end; the open end of each filter cartridge is arranged on the first step plate; the closed end of each filter cartridge is arranged on the second step plate; the open end of each filter cartridge is located at the upper part of the closed end and is toward the side of the air storage pipe; a plurality of nozzles are arranged in the air storage pipe; air outlets of the nozzles are arranged in the box body and correspond to the open ends of the filter cartridges; an electromagnetic valve is arranged at the connected part of the air storage pipe and the nozzles; a dust collecting hopper is arranged at the lower end of the box body; and a spiral folded plate is arranged on the outer wall of each filter cartridge. The cartridge dust collector is full in filtration and good in dust collecting effect, and subsequent replacement or cleaning of the filter cartridges is convenient.