Machine for cutting stalks

The utility model relates to a novel machine for cutting stalks, which belongs to the technical field of agriculture and animal husbandry machine and is provided with universal components of the ordinary machine for cutting stalks. The utility model is characterized in that a cutter wheel (8) is arranged in a cutter wheel box (2) and is fixed to a rotating shaft with removability, a cross-cutting knife (10) and a vertical riving knife (13) with inwardly concave arc-shaped cutting edges are installed on the cutter wheel box, and the vertical riving knife (13) is provided with a vertical riving knife blade (14) and a small vertical riving knife back (15) processed integrally and regularly fixed to a big vertical riving knife back (16). The utility model has the advantages that stalks are cleaved firstly in axial direction and then in radial direction to add incising surface area of chopping stalks, be favorable to stalk padding and promote quick fermentation, and enhance stalk quality and utilization ratio.