Split type pile replacing device of offshore pile driver

The invention discloses a split type driving device of an offshore pile driver, belongs to the technical field of parts of offshore hydraulic hammer driving systems, and compared with the prior art, the split type driving device is integrally in a cylindrical frustum shape, so that a hammer core of the hydraulic pile driver can be suitable for various pile bodies with different sizes; the driving-replacing device is arranged between the hammer core of the pile driver and the tubular pile, so that the impact force of the hammer core of the pile driver on the pile body can be reduced; the hollowed-out groove is designed according to a topological optimization result, and the performance of the replacement can not be weakened while the quality of the replacement is reduced; the replacing and beating device is divided into an upper replacing and beating device and a lower replacing and beating device and can be manufactured and transported more conveniently; and when the beating replacing device inclines, the mag