The invention discloses a fire-fighting ax for easy replacement of the ax head, which comprises an ax handle, a cross bar is slidably connected to the bottom of the inner wall of the ax handle, and the left side of the cross bar penetrates to the left side of the ax handle and is fixedly connected with the ax head. A first threaded pipe is sleeved on the surface of the crossbar located outside the handle of the axe, and a second threaded pipe is threaded on the surface of the first threaded pipe, and the right side of the second threaded pipe is slidably connected to the left side of the handle . The present invention solves the problem of existing problems by arranging an ax handle, a cross bar, an ax head, a first threaded pipe, a second threaded pipe, a casing, a baffle, a clamping rod, a clamping groove, a movable block, a screw rod, a turntable and a handle. The fire ax needs to be replaced if the ax is damaged during use. The fire ax that is easy to replace the ax has the advantage of being easy to replace the ax, reduces the economic consumption of the user, facilitates the use of the user, and improves the The utility of the fire axe.