The utility model discloses an air box pulse ash removal system for a microporous membrane dust remover. Filter comprising a filter chamber, an air purifying chamber is arranged at the top of the filter material chamber; an ash hopper is arranged at the bottom of the filter material chamber, the filter material chamber and the air purification chamber are isolated through a pattern plate, a plurality of air holes are formed in the surface of the pattern plate, plate-type microporous membrane filter materials are fixedly installed at the air holes in the bottom surface of the pattern plate, a pulse blowing mechanism is arranged on one side of the air purification chamber, and an air inlet pipeline is arranged on the side wall of the upper end of the ash hopper. According to the utility model, an air box pulse ash removal mode is adopted, so that the ash removal strength of the microporous membrane filter material is enhanced, the acting force of the ash removal pipeline in the whole microporous membrane filter material is relatively uniform, the ash removal effect is good, the secondary adsorption of dust is eliminated, the filtering load of the filter material is reduced, and the stable operation of the dust remover is facilitated.