Punching device with pneumatic waste collecting function

The utility model relates to the field of punching devices, in particular to a punching device with a pneumatic waste collecting function, the punching device comprises a rack and a waste collecting mechanism, the waste collecting mechanism comprises a collecting box, an air blowing pipe and an air pump, the rack is provided with a sliding groove, the sliding groove extends to one end of the rack in the horizontal direction, and the air blowing pipe is arranged in the sliding groove. The collecting box is fixedly provided with a sliding block, and the sliding block is matched with the sliding groove in a sliding mode. A material collecting cavity is formed in the collecting box, a feeding port is formed in the top of the collecting box and communicates with the material collecting cavity, one end of the air blowing pipe is installed on the collecting box and communicates with the material collecting cavity, and the connecting position of the air blowing pipe and the collecting box is arranged close to the fee