NOVELTY - A livestock breeding waste water processing method involves producing marsh gas followed by decomposing organic mater. The generated methane and carbon dioxide are collected. A livestock and poultry breeding waste water are discharged. The waste water is subjected to coarse floating object separation. A precipitate is separated. A biochemical of an aeration biological filter tank enters an aeration biological filter pool. The waste water is subjected to an aeration biological filter pool biochemical treatment. The water is sterilized followed by fermenting to obtain an organic fertilizer.    USE - Method for processing livestock breeding waste water.    ADVANTAGE - The method enables processing livestock breeding waste water with good processing effect, low energy consumption is low, and high economic benefit.    DETAILED DESCRIPTION - A livestock breeding waste water processing method involves utilizing resources, and producing marsh gas through anaerobic digestion. A waste water collecting pipe is passed through an anaerobic tank. An absorption is performed by anaerobic bacteria in the anaerobic tank, followed by decomposing organic mater such as facultative bacteria, yeast and methane into methane and carbon dioxide to improve B/C value of waste water and biodegradability of the waste water. The generated methane and carbon dioxide are collected to obtain the marsh gas, which passes through a gas collecting device. A livestock and poultry breeding waste water after an anaerobic treatment are discharged through a pipeline grid tank. The waste water is subjected to coarse floating object separation for removing and collecting excrement slag for preventing subsequent processing of a block. A water quality and quantity of a pool is adjusted. A precipitate is separated. A biochemical of an aeration biological filter tank enters an aeration biological filter pool followed by removing ammonia from the waste water through oxidative degradation effect for purifying the waste water, and removing COD, SS, ammonia nitrogen and phosphorus to obtain a purified waste water. The waste water is subjected to an aeration biological filter pool biochemical treatment. The water is sterilized followed by removing chroma, sterilizing, disinfecting and collecting in the pool of the waste water for breeding 6-80 % water. Sludge is subjected to the aeration biological filter pool biochemical treatment into a sludge tank by a pipeline to obtain a dry sludge followed by dehydrating the sludge, a straw, a bran, a cake cypress and a grain into a processing machine, and fermenting to obtain an organic fertilizer. A compound fertilizer is added into the obtained organic fertilizer.