Mouth grinding machine for knife edge of die-cutting knife

The opening grinding machine comprises a bottom plate, a plurality of support legs are fixedly connected to the bottom end of the bottom plate, a first supporting plate is fixedly connected to the top end of the bottom plate, a through groove is formed in the left side of the top end of the first supporting plate, a second fixing rod is fixedly connected into the through groove, and a top end positioning plate is arranged on the outer side of the second fixing rod in a sleeved mode. The top end positioning plate is connected with the through groove in a sliding mode. According to the edge grinding machine for the die-cutting knife edge, a first motor is started to drive a first threaded rod to rotate, a bottom end positioning plate and a top end positioning plate are close to each other to clamp and fix a die-cutting knife, a second motor is started to drive a gear to rotate, the die-cutting knife is driven to move, and therefore the device can fix the die-cutting knife; and a complete knife edge can be polis