NOVELTY - Producing fuel ethanol and feed protein from dining hall and kitchen waste comprises (a) crushing and stewing the dining hall and kitchen waste, adding water with the crushed waste, boiling the mixture, repeatedly adding water and boiling for two times, (b) centrifuging, drying and dehydrating the mixture to carry out solid-liquid separation, drying the solid part using microwave vacuum drying method to obtain microwave power, drying and dehydrating the solid part and (c) squeezing and swelling the obtained product and carrying out extruding and expanding treatment to the kitchen waste.    USE - The method is useful for producing fuel ethanol and feed protein from dining hall and kitchen waste.    ADVANTAGE - The method economically produces fuel ethanol and feed protein and avoids polluting the environment.    DETAILED DESCRIPTION - Producing fuel ethanol and feed protein from dining hall and kitchen waste comprises (a) crushing and stewing the dining hall and kitchen waste, adding water with the crushed waste for two times, boiling the mixture for 30 minutes, repeatedly adding water and boiling for two times, (b) centrifuging, drying and dehydrating the mixture to carry out solid-liquid separation, drying the solid part using microwave vacuum drying method to obtain microwave power (5-10 w/g), drying and dehydrating the solid at vacuum degree of 0.1 MPa, (c) squeezing and swelling the obtained product using an extrusion bulking machine at 100-150 revolutions per minute and 140-160 degrees C, carrying out extruding and expanding treatment to the kitchen waste after drying, (d) synchronously saccharifying and fermenting the extrusion of the kitchen waste, adding water with the kitchen waste extrusion for 5-10 times and then stirring for 30 minutes, cooling the waste to 45 degrees C, adjusting the pH value of the waste to 4-6, adding 1-5% of cellulose, 0.4-0.6% of maltogenic amylase and high temperature resistant dried yeast (1-5%) with the waste at temperature of 40-45 degrees C, carrying out simultaneous saccharification and fermentation at 40-50 hours, (e) ethanol distilling the fermented material, filtering the filtrate and concentrating at 80 degrees C to obtain the filtrate with ethanol content more than 95%, and (f) separating the residue protein from the waste and preparing the material liquid, adding water with the material liquid to dilute for 5-10 times, adding sodium hydroxide solution with the material liquid to adjust the pH value to 8-8.5 and then heat preservating at 60 degrees C for 2 hours, stirring the material liquid at 4000 revolutions per minute, adding hydrochloric acid with the material liquid to adjust the pH value to 4-4.5, centrifuging and collecting the precipitate and washing the precipitate by distilled water and ultrafiltration membrane, concentrating the precipitate having solid content of 30-35% and then spraying and drying to obtain feed protein.