Slitting machine

The utility model relates to the field of slitting of plastic bags, in particular to a slitting machine, which comprises a body, a conveying line and a cutter are arranged on the body, the conveying line is used for guiding a plastic bag prototype to move, the cutter is positioned in a moving path of the plastic bag prototype, and the double-layer plastic bag prototype is split into two single-layer plastic bag prototypes after passing through the cutter. An opening assembly is further arranged in the moving path of the plastic bag prototype, the cutter is fixed to the opening assembly, and the cutter is prevented from loosening; compared with a mode of directly binding with an adhesive tape or a rope, a connecting mode of fixing the cutter on the expanding assembly is adopted, so that the single-layer plastic bag slitting device is more stable and reliable, not only cannot loosen, but also can avoid deflection of the cutter, and can prevent the situation that the widths of slit single-layer plastic bag proto