NOVELTY - Preparing straw feed by crushing straw raw material, performing ammonia treatment using e.g. ammonia water, and processing to obtain ammoniated straw, mixing with corncob granules, adding e.g. water, mixing, fermenting by adding fermentation microbial agent, to prepare degrading enzyme straw, adding Lactobacillus plantarum to straw raw material, carrying out silage process to obtain silage straw, mixing e.g. ammoniated straw and silage straw, adding e.g. water, and fermenting to obtain aqueous fermented straw material and drying and granulating product.    USE - The method is useful for preparing straw feed (claimed).    ADVANTAGE - The method prepares straw feed with enhanced nutrient content and degrading efficiency, and is cost-effective, and simple and convenient to operate as the feed is degraded using efficient fiber lignin degrading bacteria which is a straw degrading enzyme, and fermented using simple equipment.    DETAILED DESCRIPTION - Preparing straw feed involves (a) crushing the straw raw material until the particle size of the straw is 0.3-1 cm, (b) performing ammonia treatment using ammonia water or urea solution at 30-35 degrees C, and processing for 5-7 weeks to obtain ammoniated straw, (c) mixing the above-obtained ammoniated straw and corncob granules with grain diameter of 1-2 cm, adding water until the moisture content of the mixture reaches 55-65%, adding 20 wt.% lactic acid solution or acetic acid solution to adjust the pH of the mixture to 5.5-6.5, mixing uniformly and adding the resulting mixture in fermentation microbial agent, and fermenting the mixture at 30-35 degrees C for 3-4 days, where the fermentation mixture is turned every 1-2 days to prepare degrading enzyme straw, (d) adding Lactobacillus plantarum to 4 wt.% straw raw material, and carrying out silage process at 18-25 degrees C for 30-35 days to obtain silage straw, (e) mixing the ammoniated straw obtained in step (b), degrading enzyme straw obtained in step (c) and silage straw obtained in step (d), adding water until the moisture content of the mixture reaches 55-65%, adding the fermentation broth, fermenting the mixture for 4-8 days, maintaining the moisture content of the mixture, and turning the mixture 1-2 times every day to obtain aqueous fermented straw material and (f) drying the aqueous fermented straw material and granulating product.