The invention discloses a flue cleaning device, and belongs to the field of flue cleaning devices. The flue cleaning device is characterized in that a guide barrel is sleeved with a rotary barrel androtationally connected with the rotary barrel, and the lower end of the rotary barrel penetrates a through hole in a partition to be fixedly connected with a worm wheel hole of a worm wheel; the rotary barrel is rotationally connected with the through hole of the partition and a through hole of a guide disc, and the rotary barrel is fixedly connected with a center hole of a first guide plate and acenter hole of a second guide plate; and two sets of telescopic devices are arranged, and each set of telescopic device comprises a first outer barrel, an inner barrel and a screw, wherein the lowerend of the first outer barrel is connected with a base with a through hole, the upper end of the first outer barrel penetrates the guide disc and the second guide plate, an axial threaded hole is formed in the inner wall of the inner barrel, the inner barrel is inserted into a barrel cavity of the first outer barrel, the upper end of the screw penetrates the base through hole of the first outer barrel to be in threaded connection with the axial threaded hole of the inner barrel, and the screw is rotationally connected with the base through hole of the first outer barrel. Compared with the prior art, the flue cleaning device has the beneficial effects of being simple in structure and reasonable in design.