Plastic bag punching machine

The utility model provides a plastic bag punching machine which comprises a machine frame. A conveyer belt is arranged on the machine frame, a first transmitting mechanism is arranged on one side of the conveyer belt, and a second transmitting mechanism is arranged on the machine frame and above the conveyer belt. The second transmitting mechanism comprises a synchronous belt, wherein a manipulator is arranged on the synchronous belt. The manipulator comprises a manipulator air cylinder, the manipulator air cylinder is connected with a push plate through a piston rod, an open opening is formed in the push plate, a protrusion is arranged on the open opening in a sleeved mode, the protrusion is arranged at the upper end of a fixed plate, the lower end of the fixed plate is in hinge connection with the right side of the rear end of a press rod, and a press pin is arranged on the left side of the front end of the press rod. A longitudinal guide rail is arranged in front of the synchronous belt, the fixed plate is arranged on a cart, wheels of the cart are arranged in the guide rail, a shoveling block is arranged on the cart and under the press rod, and a punching mechanism is arranged at one end of the conveyer belt. The plastic bag punching machine is high in work efficiency, high in processing accuracy and low in error rate. Furthermore, the labor cost is greatly reduced.