NOVELTY - The device comprises: a screw disposed below a floor of a hopper; a screw housing surrounding the screw; a drive motor and a supply pipe arranged at ends of the screw; a pressing cylinder disposed on the supply pipe; a crimping cylinder surface crimping the end of the pressing cylinder; a fuel chip discharging pipe connected with the supply pipe; a compression plate cylinder arranged in the fuel chip discharging pipe; a compression plate formed in an end of the cylinder; a liquid outlet formed in the discharging pipe; and a sample reduction liquid collector connected with the liquid outlet.    USE - The device is useful for preparing fuel chip from livestock excrement (claimed).    ADVANTAGE - The device can prepare the fuel chip in a simple and cost-effective manner without the need of separate dryer. The sample reduction liquid collector separately collects the sample reduction liquid, thus preventing the environmental contamination and increasing the efficiency of the sample reduction.    DETAILED DESCRIPTION - The device comprises: a hopper; a screw horizontally disposed below a floor of the hopper; a screw housing surrounding the screw; a drive motor arranged at an end of the screw; a supply pipe formed in another end of the screw; a pressing cylinder disposed on the supply pipe; a crimping cylinder surface crimping the end of the pressing cylinder; a fuel chip discharging pipe connected with the supply pipe; a compression plate cylinder arranged in the fuel chip discharging pipe; a compression plate formed in an end of the compression plate cylinder; a liquid outlet formed in the fuel chip discharging pipe; a sample reduction liquid collector connected with the liquid outlet; and a fuel chip collector disposed on another end of the fuel chip discharging pipe. The device further comprises a cone-shaped or cylinder-shaped protrusion arranged in the pressing cylinder crimping surface. A microorganism or additive supply unit supplies a liquid fertilizer to the collected sample reduction liquid, where the additive is photosynthetic bacterium, Lactobacillus, koji mold or phytic acid. A dehydration or water adding device is arranged in an outer side of the device. A fan is arranged at a lower part of the hopper. A fan housing covers the fan. An INDEPENDENT CLAIM is included for a method for preparing fuel chip from livestock excrement.