NOVELTY - Processing livestock excretion into liquefied fertilizer, comprises performing anaerobic fermentation of livestock excretion and microorganisms to reduce biological oxygen demand (BOD) concentration and maintain oxidation reduction potential (ORP) level, performing solid-liquid separation of fermented livestock excretion slurry to reduce BOD, performing first aerobic fermentation process to control e.g. ammonia, refluxing some portion of fermented liquid into storage tank, performing second fermentation process on fermented liquid to obtain liquid fertilizer and spraying on agricultural land.    USE - The method is useful for processing livestock excretion into liquefied fertilizer (claimed).    ADVANTAGE - The liquefied fertilizer is environmentally friendly, efficiently and reliably recyclable and disposable, solves the odor problems caused during spraying by reducing ammonia concentration and VFA concentration, and improves operating efficiency and management facilities.    DETAILED DESCRIPTION - Processing livestock excretion into liquefied fertilizer, comprises (a) mixing livestock excretion with microorganisms in a pig slurry pit, performing anaerobic fermentation under stirring condition to reduce biological oxygen demand (BOD) concentration and maintain the oxidation reduction potential (ORP) level, (b) performing solid-liquid separation of the fermented livestock excretion slurry to reduce BOD, (c) performing first fermentation process by supplying air to the separated liquid, and performing aerobic fermentation at high temperature to control ammonia, BOD and volatile fatty acids (VFA) and to maintain constant ORP level, (d) refluxing some portion of the fermented liquid manure into the storage tank to accelerate the degradation by increasing the speed in the storage tank, (e) performing second fermentation process by supplying remaining amount of air into the fermentation broth to maintain ORP at -150 to -50 mV, reduce the concentration of BOD and VFA, and maintain nitrogen concentration to 2500 parts per million to obtain the liquid fertilizer, and (f) spraying the obtained liquid fertilizer on agricultural land.    DESCRIPTION OF DRAWING(S) - The drawing shows a flowchart representation of the method for processing livestock excretion into liquefied fertilizer.    Pig slurry management step (S1)    Solid-liquid separation step (S2)    First fermentation process step (S3)    Second fermentation process step (S5)    Spraying step (S6)