The invention belongs to the field of chimneys, and particularly relates to a self-cleaning dust filtering chimney, comprising a chimney body; an annular sealing plate is fixedly connected in the chimney body; a cylindrical filter element is fixedly connected in the annular sealing plate; the cylindrical filter element is internally provided with an annular plate; a plurality of dust suction branch pipes are embedded on the side wall of the annular plate; the input ends of the dust collection branch pipes are in abutting contact with the inner side wall of the cylindrical filter element; a dust collection main pipe is slidably and sealingly connected in the cylindrical filter element; the output ends of the plurality of dust collection branch pipes communicate with the dust collection mainpipe; the upper side of the chimney body is provided with a conical rain shielding plate, a conical cavity is arranged in the rain shielding plate, the upper end of the dust collection main pipe extends into the conical cavity and is fixedly connected with the rain shielding plate, the upper end edge of the dust collection main pipe is turned outwards to form a dust shielding ring, the upper endof the conical cavity is provided with an opening, and the opening is internally and fixedly connected with an unpowered wind ball. The self-cleaning dust filtering chimney provided by the invention can suck and clean the filter element continuously by using the wind power, and then the service period of the filter element can be prolonged.