NOVELTY - Comprehensive utilization of sweet sorghum stalks involves preparing straw slurry, then adding extracting agent, extracting the tannin, and then prepare pectin, ethanol, cellulose and lignin, to make a full of straw    USE - As comprehensive utilization of sweet sorghum stalks (claimed).    ADVANTAGE - The method is environment-friendly; makes full use of the straw in a useful substance, increases the straw processing, increases the resource utilization efficiency, increases the enthusiasm of farmer planting of sweet sorghum, and effectively promote the sweet sorghum raw material of base.    DETAILED DESCRIPTION - Comprehensive utilization of sweet sorghum stalks involves preparing straw slurry: taking the fresh sweet sorghum straw removing leaves, crushing, grinding into more than 80 meshes of sweet sorghum straw high pole slurry, (2) preparing tannin extracting the sweet sorghum straw slurry into fractionating tower, adding extracting agent, fully stirring, standing layering, the upper layer extracting liquid into distiller, distilling extracting agent, extracting agent evaporation to obtain tannin, juice extracting: (2) fractionating layer of slurry by pressing, a squeezed sweet sorghum straw slurry material of sugar juice, and the pressing of sweet sorghum straw high pole slurry residue with clean water leaching, a pressing process, and the two pressing the sugar mixture, (4) prepare pectin of the two pressing sweet sorghum straw pole slurry slag high in reaction tank, and adding dilute sulfuric acid, and then steam heating to 80-100 degrees C, and keeping the temperature for 20-40 minutes, dissolving high sweet sorghum straw in pole slurry residue of pectin, then pressing, a pectin solution with high sweet sorghum straw slurry slag separate pole, adding active carbon in the solution and the pectin, glue solution decoloring, filtering, adding ethanol in the liquid pectin, separating, cleaning, drying, crushing to obtain the pectin product, separating the solution pump into a distiller, recycling ethanol, liquid of residue for subsequent pressure acid hydrolysis solution, preparation of ethanol: extracting pectin solution in a high sweet sorghum straw pole slurry residue and residual liquid of mixed uniform, and mixing the sulfuric acid concentration of the material regulating to 3-8%, pump into reaction tank, and introducing steam heating to 115-125 degrees C, holding 50-90 minutes to finish the depressure acid process, the fully degrading hemicellulose liquid in acid, and then cooling the reaction tank water cooling, squeezing juice, extracting sugar juice mixture, adding ammonia water, then sealing fermenting bag taking anaerobic fermenting for 30-48 hours, a residual reducing sugar content, reducing sugar content is less than 0.5%, alcohol fermenting, where the fermentation mature a wine liquid into the distillation kettle, distilling crude alcohol extract, and then rectifying, dehydrating, obtaining fuel ethanol fermentation bag inner residual viable precipitated mud, for lower primary sugar fermenting, repeatedly for 5-6 times, cleaning, drying, preparing yeast protein feed, preparation of cellulose and lignin: taking squeezing juice of sweet sorghum straw high pole slurry slag, leaching by clean, taking out diluted sugar juice, pressing the rare sugar of sweet sorghum straw high pole slurry slag into slag mass is 4-6 times of 30% in ethanol, and adding KOH as catalyst, mix uniformly, into enamel reaction tank, closeness, and introducing steam heating, the temperature to 95-105 degrees C, holding 55-65 minutes to finish the pressure process of alcoholysis material slag, the slag material of fully degrading lignin, through cold water cooling reaction tank, temperature is reduced to 50 degrees C, and following the slag and lignin cellulose solution, cellulose slag material, firstly using 30% alcohol to wash, and then using clean water washing and bleaching to obtain cellulose, lignin solution for distillation, a wine liquid, the separated lignin filter, washing, drying to obtain the lignin; a wine liquid continuously for alcohol precipitation.