Punching device for plastic packaging bag

The utility model belongs to the technical field of punching devices, and particularly relates to a plastic packaging bag punching device which comprises a punching device body, a sliding plate is in contact with the punching device body, a groove is formed in the sliding plate, a moving mechanism is arranged on the sliding plate, a connecting rod is connected into the sliding plate in a sliding mode, and the connecting rod is connected with the sliding plate in a sliding mode. A clamping plate is fixedly connected to the connecting rod, the clamping plate is in contact with the sliding plate, a limiting plate is fixedly connected to the connecting rod, a spring is arranged on the outer side of the connecting rod, one end of the spring is in contact with the limiting plate, and the other end of the spring is in contact with the sliding plate. According to the plastic packaging bag punching device, the clamping plates, the connecting rods, the springs and other parts are arranged, the clamping plates can be dr