A device for removing water from livestock waste according to an embodiment of the present invention comprises: a porous filter which is hollow inside, includes an inlet port formed on one side thereof so as to feed livestock waste thereinto and a discharge port formed on the other side thereof so as to discharge dehydrated livestock waste therefrom, and has a plurality of water discharge holes formed such that the inside of the filter communicates with the outside of the filter through the discharge holes; and a screw which includes a rotary shaft and spiral blades formed in the longitudinal direction of the rotary shaft, is formed such that both the pitch (P) between the blades and the depth (D) of valleys between the blades gradually decrease as going from the inlet port to the discharge port in the longitudinal direction, and is received in the porous filter while being spaced apart therefrom.