Punching machine for packaging bag

The utility model relates to the technical field of punching, in particular to a packaging bag punching machine which comprises an unwinding mechanism, a punching mechanism and a winding mechanism, the unwinding mechanism and the winding mechanism are arranged at the feeding end and the discharging end of the punching mechanism respectively, the punching mechanism comprises a cutter assembly and further comprises a discharging table located at the discharging end of the cutter assembly, and the discharging table is located at the discharging end of the cutter assembly. A strip-shaped chip leaking hole is formed in the discharging table, and the length direction of the chip leaking hole is perpendicular to the conveying direction of the neck patch. A feeding table is arranged at the feeding end of the punching mechanism, and a plurality of adsorption holes are formed in the feeding table. The punched neck patch belt passes through the upper portion of the chip leaking hole, chips carried on the punched neck pa