The invention discloses a water-absorbing tube cleaner. The water-absorbing tube cleaner comprises a cylindrical metal barrel, macromolecular water-absorbing resin located in the cylindrical metal barrel, an arc-shaped water collector, balls inlaid into the barrel wall of the cylindrical metal barrel, flow guiding pipes arranged on the inner side of the barrel wall of the cylindrical metal barrel, a packing cup fixed to the tail end of the cylindrical metal barrel, and a packing cup tube cleaner connected with the tail end of the cylindrical metal barrel, wherein the barrel wall of the cylindrical metal barrel is of a hollowed-out netty structure; the arc-shaped water collector is arranged at the front end of the cylindrical metal barrel; the surface of the arc-shaped water collector is provided with a plurality of small holes; the surfaces of the flow guiding pipes are provided with a plurality of small holes; one ends of the flow guiding pipes are communicated with the small holes of the surface of the arc-shaped water collector, and the other ends of the flow guiding pipes extend into the bottom of the cylindrical metal barrel; the pipe walls of the flow guiding pipes make contact with the macromolecular water-absorbing resin. The water-absorbing tube cleaner is high in water-absorbing property and capable of cleaning up residual water in the low-lying positions of natural gas and oil product pipelines, and the corrosion and ice blockage phenomena of the pipelines are effectively relieved.