A high power kinetic energy generating device comprises: a magnetic group, a magnetically permeable cavity body, and a coil. The magnetic group comprises an upper magnetically permeable member, a lower magnetically permeable member, and a permanent magnet member. A magnetic gap is defined between the upper magnetically permeable member and the lower magnetically permeable member. The magnetically permeable cavity body and the magnetic group form a magnetically permeable cavity. The magnetically permeable cavity body further comprises a middle column arranged in the magnetically permeable cavity. The coil is also arranged in the magnetically permeable cavity, and surrounds the middle column. The middle column extends into the magnetic gap. The magnetic group is displaced relatively to the middle column, so that the middle column moves into contact the upper magnetically permeable member and the lower magnetically permeable member alternately, which changes the direction of magnetic induction lines passing through the coil and therefore generates an induced current.