NOVELTY - Separating kitchen waste for recycling and comprehensive utilization of waste grease comprises e.g.: separating and sorting plastics, metals, bowl debris and other sundries in the kitchen waste; crushing the sorted kitchen waste; saccharifying the crushed kitchen waste; separating the kitchen waste saccharifying solution; performing solid-liquid separation in kitchen waste saccharifying solution to obtain upper oil layer, saccharified kitchen waste and saccharifying slag; filtering to obtain saccharified kitchen waste and greases; and separating the obtained grease for producing biodiesel.    USE - The method is useful for separating kitchen waste for recycling and comprehensive utilization of waste grease.    ADVANTAGE - The method: is convenient to process, achieves high oil recovery rate, is economical in producing oil and can significantly realize the oil separation from the kitchen waste; further utilizes the kitchen waste to need to improve the lactic acid fermentation and separation of fermentation liquid.    DETAILED DESCRIPTION - Separating kitchen waste for recycling and comprehensive utilization of waste grease comprises: (a) separating and sorting plastics, metals, bowl debris and other sundries in the kitchen waste; (b) crushing the sorted kitchen waste; (c) adding enzyme preparation to saccharify the crushed kitchen waste; (d) centrifugally separating the kitchen waste saccharifying solution; (e) performing solid-liquid separation in kitchen waste saccharifying solution containing upper grease and saccharification residue, and obtaining upper oil layer, saccharified kitchen waste and saccharifying slag; (f) filtering the kitchen waste saccharifying solution in a fiber ball-ceramic composite bed filter to further remove the oil in food waste to obtain saccharified kitchen waste and greases; (g) separating the obtained grease for producing biodiesel; (h) carrying out lactic acid fermentation of kitchen waste saccharified solution; and (i) separating the obtained kitchen waste lactic acid fermented solution by electrodialysis.