Abstract: Disclosed is a mangling device for fibers, fiber webs or analogues, which comprises two rollers and two conveying mechanisms. At least one of the two rollers is a driving roller. The conveying mechanism comprises at least one driving roller, a plurality of carrier rollers and guiding belts installed on the driving roller and the carrier rollers in a tensioning manner. A space which is used for the fibers, the fiber webs or the analogues to pass is arranged between the two guiding belts, and the portions of the two guiding belts forming the passing space of the fibers, the fiber webs or the analogues are parallel to each other. The two rollers are respectively installed in positions corresponding to the passing space of the two guiding belts.