The utility model discloses an agricultural puncher of rack gear formula, which comprises a frame, the frame front end is equipped with the wheel carrier, and rotate on the wheel carrier and be connected with the wheel that loosens the soil, the slide has been seted up to the frame both sides, and sliding connection has and presses the screens board between the slide of both sides, has seted up the through -hole on pressing the screens board, and sliding connection has the pivot in the through -hole, and pivot one end is equipped with the drift, and other end rigid coupling has the rack, and the meshing is connected with drive gear on the rack, and the drive gear center is equipped with the gear shaft, and the gear shaft both ends are rotated respectively and are connected with the bearingframe, the bearing frame all with frame fixed connection, the last still fixedly connected with shift fork of drive gear is equipped with the cover and establishes on the epaxial torsion spring of gear, torsion spring one end and bearing frame fixed connection, the other end and shift fork fixed connection. The utility model discloses can need not handheld the operation, the long -time use difficultly, and it is efficient wholly to punch.