The invention discloses a low-energy consumption animal crushing machine, which comprises a feeding hole, a frame, a hob shaft, a balance wheel, a left fixed knife, a right fixed knife, a screw conveyer, a power transmission device and a feeding mechanism, wherein the feeding mechanism consists of a speed-reducing motor, a coupler, a chain wheel, a chain, a chain transmission shaft, a hopper and a bracket; an inner raceway and a front raceway are formed on an upright post of the bracket; two sides of the hopper are provided with a front roller and a rear roller; a covering cap which is automatically opened and closed on the feeding hole is connected with the hopper through a connecting rod; the screw conveyer is adjacent to the hob shaft and is positioned below the hob shaft; and a rotating axis of the screw conveyer is parallel to an axis of the hob shaft. By the adoption of single-stage crushing of a single hob shaft, the service efficiency is low, and the power supply conditions of a farm can be met; and moreover, the equipment is fully equipped, the feeding and crushing of large animal carcass and crushed material output can be automatically finished.