NOVELTY - Recycling fecal sewage and crop straw of livestock and poultry farms, involves (a) adjusting solid content of the fecal sewage, adding inoculum to the sewage and performing anaerobic digestion, performing methane energy utilization, performing solid-liquid separation of the obtained methane, mixing the obtained methane slag and partial methane liquid with straw and partial excrement, and mixing partial methane liquid with the crushed straw, mixing the methane slag with the processed straw and partial excrement, and performing aerobic composting process.    USE - The method is useful for recycling fecal sewage and crop straw of scale livestock and poultry farm for producing methane liquid used for producing the biological organic complex fertilizer with high additional value (claimed).    ADVANTAGE - The method enables comprehensive utilization of the sewage and the straw of livestock and poultry farms.    DETAILED DESCRIPTION - Method for recycling fecal sewage and crop straw of scale livestock and poultry farm, involves (a) performing anaerobic digestion by (i) adjusting solid content of the fecal sewage to 5-10%, and (ii) adding anaerobic digestion inoculum to the adjusted sewage and performing anaerobic digestion to generate methane, where the digestion temperature is 35-40 degrees C, and digestion period is 20-30 days, (b) performing methane energy utilization by (i) purifying the obtained methane, (c) performing solid-liquid separation of the obtained methane by (i) separating methane slag and the methane liquid in the obtained in the step (a), where the water content of the methane slag is 60%, (d) mixing the obtained methane slag and partial methane liquid with straw and partial excrement for performing aerobic composting process, and (e) (i) mixing partial methane liquid obtained in the step (c) with the crushed straw, (ii) adjusting the mixture until the water content of the mixture is 50-60%, (iii) mixing the methane slag with the processed straw and partial excrement for adjusting the water content to 50-60%, (iv) performing aerobic composting process by ventilating or piling the compost manually at regular time for 25-35 days after carbon and nitrogen ratio is adjusted to 25-35.