NOVELTY - The method comprises mixing bamboo leaves, pine needles, plum leaves, peach tree leaves, chestnut leaves and persimmon leaves with 1.5-3 pts. wt. of molasses, 0.1-0.8 pts. wt. of rice bran and 100 pts. wt. of water at 37-42 degrees C, performing anaerobic fermentation on the mixture in an anaerobic fermenter at 5-25 degrees C for 1.5-2.5 days, mixing 0.1-0.5 pts. wt. of supernatant of the fermented mixture and 1-2 pts. wt. of fermentation by-product to obtain a mixture product, and transferring the mixture product to a facultative anaerobic fermenter.    USE - The method is useful for processing biodegradable liquefied waste such as food waste (claimed), leachate, excrements of humans or domestic animals and sewage.    ADVANTAGE - The method is capable of effectively processing the biodegradable liquefied waste in an economical manner with reduced odor.    DETAILED DESCRIPTION - The method comprises: (A) mixing bamboo leaves, pine needles, plum leaves, peach tree leaves, chestnut leaves and persimmon leaves with 1.5-3 pts. wt. of molasses, 0.1-0.8 pts. wt. of rice bran and 100 pts. wt. of water at 37-42 degrees C, performing anaerobic fermentation on the mixture in an anaerobic fermenter at 5-25 degrees C for 1.5-2.5 days, mixing 0.1-0.5 pts. wt. of supernatant of the fermented mixture and 1-2 pts. wt. of fermentation by-product to obtain a mixture product, and transferring the mixture product to a facultative anaerobic fermenter and then carrying out facultative anaerobic fermentation with microbial cells and extra cellular enzyme to prepare a fermented product; (B) adding 0.01-5 pts. wt. of the fermented product in biodegradable liquid waste to decompose the waste and then fermenting for 0.5-15 days; and (C) transferring fermentation supernatant to a settling tank and sediment of the waste to a fermenter stage of the settling tank. The solid content of the biodegradation waste is transferred to a disposer for pulverizing the waste. The pulverized waste having a size of 0.1-5 mm is filtered through a screen. The method further comprises discharging the solid content of the waste to an adjusting bath. The precipitate of the waste is returned to the settling tank.