Adjustable corn sowing and punching device

The utility model discloses an adjustable corn sowing and punching device which comprises an ejector rod, a movable groove is formed in the middle of the outer surface of the lower end of the ejectorrod, limiting grooves are formed in the two ends of the inner surface of the movable groove, a screw rod is rotationally connected between the two limiting grooves, and an operation block is fixedly installed in the middle of the screw rod. Sliding blocks are in threaded connection with the positions, close to the two sides, of the outer surface of the screw, supporting rods are fixedly installedon the outer surfaces of the lower ends of the sliding blocks, the lower half portions of the supporting rods are sleeved with extension rods, punching heads are fixedly installed on the outer surfaces of the lower ends of the extension rods, and a pressing plate is fixedly connected between the two extension rods and close to the lower end. A plurality of fixing holes are formed in the outer surfaces of the two sides of t