Boiler fire tube cleaning device

The invention relates to a boiler fire tube cleaning device which comprises a transverse plate, a plurality of through holes are formed in the middle area of the transverse plate, a fire tube is inserted into each through hole in a penetrating mode, the transverse plate can move up and down in a reciprocating mode, and four spiral strips are arranged on the outer edge face of each fire tube. Four spiral strips on each fire tube are identical in rotating direction and spiral angle and are circumferentially and uniformly distributed around the axis of the fire tube, an annular block is rotationally connected into each through hole, bristles are uniformly distributed on the inner edge surface of each annular block along the circumference, the annular blocks can rotate when moving up and down in a reciprocating mode along with the transverse plate, and a plurality of shifting pieces capable of swinging up and down are hinged to the upper end and the lower end of each through hole. The shifting piece can impact th