The invention relates to the field of flue gas treatment, and specifically discloses a flue gas dust remover comprising a frame, a casing and a dust removal mechanism. The casing is fixedly installedon the frame, the dust removal mechanism is located inside the casing, the lower part of the casing is provided with an air inlet, the upper part of the casing is provided with an air outlet, the topof the casing is provided with a large gear shaft, a motor is connected with the large gear shaft, a plurality of small gear shafts are meshed in the large gear shaft, and each small gear shaft is fixedly connected with a dust removal column. A plurality of abutting blocks and a plurality of lantern rings are alternately arranged on the dust removal column from top to bottom, and the abutting blocks are fixedly connected with the dust removal column. The lantern rings sleeve the dust removal column at intervals. Filter layers are connected among the lantern rings on the same height of different dust removal columns, the filter layers are provided with dust filter holes, a first adsorption layer is arranged on the outer wall of each dust removal column, a baffle plate is arranged at the lower part of the casing, the baffle plate is provided with a dust falling port, and the baffle plate and the bottom of the casing are enclosed into a dust falling chamber. A fan is arranged on one sideof the dust falling chamber, and an ash outlet is arranged on the other side of the dust falling chamber. The flue gas dust remover solves the problem of dust accumulation in dust removal equipment.