Forming die slitting knife

The utility model discloses a forming die slitting knife which comprises an air cylinder, a connecting block, a quick release sliding rail, a locking block, a blade fixing plate, a blade and a lower die knife groove. The cylinder is fixedly connected with a connecting block through a floating joint; the connecting block is movably connected with a quick-release slide rail; the locking blocks are fixedly connected to the two ends of the quick-release sliding rail. The blade is fixed on the quick release slide rail through a blade fixing plate; the lower die cutter groove is correspondingly formed under the blade and comprises a first groove plate and a second groove plate. The air cylinder, the connecting block blade and the lower die cutter groove are combined to form the automatic cuttingdevice, and cloth can be cut into different widths. In addition, deviation of a preset track is avoided in the cutting process, the cut face or edge of cut cloth is neat, the structure is simple, operation is safe, the autom