Machine (1) for shredding bedding products comprising a frame (2) a shredding device (4) a supply mouth (6) a device for crumbling (12) the bedding products shredded by the shredding device comprising: a rotor (13) comprising a plurality of knives (19) swively mounted on the peripheral portion (15) of the rotor so that they can rotate freely with respect to the rotor, the knives being configured for crumbling, as a result of rotor rotation, the bedding products shredded from the shredding device and a grid (17) arranged to surround at least a portion of the peripheral portion of the rotor, in a position radially external to the knives, and provided with a plurality of openings (18) radially passing through the grid, and a conveying device (70) mounted on the frame and configured for conveying to the supply mouth the bedding products which cross the openings of the grid.
