The invention relates to a bag-type energy-saving dust remover comprising a main box body, a lower box body, filter bags and filter bag hanging pieces, wherein the filter bags and the filter bag hanging pieces are positioned in the box bodies. Compared with the traditional dust remover, the volume of the main box body and the wind disposal quantity are not changed, and the filtering area is different; the bag-type energy-saving dust remover comprises pattern cards which are positioned in the box bodies and are provided with a plurality of slots, each of the filter bags positioned in the slots of the pattern cards is provided with a plurality of cloth bag strings which are formed by connecting small-diameter small bags together and have the effective filtering area largely increased in unit volume, effective spaces in the box bodies are fully utilized, and the effective filtering area in the volume of each cubic meter box body is increased to 30 to 40 square meters from 6 to 10 square meters, thereby increasing the effective filtering area by more than three times; the filtering wind speed is reduced to be under one third; years of practical use, former experiences and a great amount of theoretical practices prove that when the wind speed is reduced to be one third, the resistance of wind can be reduced to one sixth, namely that the energy consumption is reduced to 16.7 percent and the energy-saving rate is 83.3 percent.