NOVELTY - Producing a fuel ethanol using a Chinese chestnut comprises: smashing the peeled Chinese chestnut, watering and blending the powder; passing the slurry through digestion treatment, heating, adding high temperature resistant alpha amylase, liquefying and heating; reducing the boiled liquification mash to 60-62 centigrade, adding strong sulfuric until saccharified and sterilizing; adding dry yeast to activator, dissolving and cooling; and cooling the mash, adding the dry yeast, vibrating, fermenting, filtering the liquor, roughly distilling and rectifying.    USE - The process deals with the production of fuel ethanol by using the Chinese chestnut.    ADVANTAGE - The process: is simple in machining technology; is easy in operation; is efficient to provide the fuel ethanol in high yield and eco-friendly; avoids the waste problem of Chinese chestnut resource; eases the reality of shortage in state energy; exploits the use channel of Chinese chestnut; supplies new resource use method for bio-energy; and uses the renewable biomass energy of Chinese chestnut.    DETAILED DESCRIPTION - Production of a fuel ethanol by using a Chinese chestnut, comprises: (a) smashing the peeled Chinese chestnut, where the smashing is continued until the fineness of Chinese chestnut powder is 20-80 meshes, watering and blending the powder until it becomes slurry, where the weight ratio of the powder to water is 1-2.5-4; (b) passing the slurry through digestion treatment and heating to 90-95 centigrade, adding a high temperature resistant alpha amylase of different level usage (10-40 units/g materials), liquefying and forming liquification mash, where the liquification time is one hour, and heating while adding continuously water; (c) reducing the boiled liquification mash to 60-62 centigrade, adding a strong sulfuric of pH 3.5-5 until saccharified, where diastatic enzyme is added to saccharify, the usage is 80-200 units/g Chinese chestnut, the saccharification time is 30 minutes, and the potassium iodide indicator test is conducted to indicate whether the saccharification is safe, after the saccharification, and sterilizing; (d) adding dry yeast to activator, which is the sweet water of 5% sugar and of 38 centigrade, in the weight ratio of 1-20, blending, dissolving for 30 minutes and cooling to 28-30 centigrade; and (e) cooling the liquification mash to 30 centigrade, adding the high activity dry yeast of high temperature resistance by the liquification mash (where the inoculum size of high activity dry yeast of high temperature resistance is 0.05-0.20 g/100 g Chinese chestnut), vibrating and fermenting under 30 centigrade for 72 hours, filtering the fermentation liquor, roughly distilling and rectifying to give the fuel ethanol.