NOVELTY - Preparation of lignin-degrading bacteria-modified straw adsorbent involves inoculating Phanerochaete chrysosporium on malt agar slant culture medium, culturing, scraping white spores on the slant medium, mixing spores with sterilized distilled water, removing mycelium from obtained spore suspension, adding dewaxed oilseed rape straw to a sealed fermenter, adding glucose and mycelium-removed suspension, fermenting, crosslinking obtained lignin-degrading bacteria modified straw with epichlorohydrin, and reacting crosslinked product and mixed alcohol solution of trimethylamine.    USE - Preparation of lignin-degrading bacteria-modified straw adsorbent used for extracting natural cellulose.    ADVANTAGE - The method enables economical preparation of lignin-degrading bacteria-modified straw adsorbent with high adsorption effect and adsorption capacity, by simple process.    DETAILED DESCRIPTION - Preparation of lignin-degrading bacteria-modified straw adsorbent involves inoculating Phanerochaete chrysosporium on malt agar slant culture medium, culturing at 35-45 degrees C for 5-7 days, scraping white spores on the slant medium, mixing spores with 200-300 mL sterilized distilled water, adding obtained spore suspension to sterile glass wool to remove mycelium, storing mycelium-removed suspension (A) in a freezer unit at 4-6 degrees C, crushing oilseed rape straw in a jet mill, sieving using 35-40-mesh sieve, drying obtained oilseed rape straw pellets at 70-80 degrees C for 45-60 minutes, adding 200-300 mL mixture of toluene and ethanol in volume ratio of 1:1 to 500 mL beaker, adding 30-50 g dried oilseed rape straw pellets, soaking for 25-35 minutes, drying, dewaxing, adding dewaxed oilseed rape straw to a sealed fermenter, adding 800-1000 mL distilled water, 20-25 g potassium hydrogen phosphate, 5-7 g magnesium sulfate and 1-3 g calcium chloride, stirring with a glass rod, adding 10-15 g glucose as nutrient, and suspension (A), sealing the fermenter with a film, fermenting at 35-45 degrees C for 2-3 weeks, filtering fermentation product to remove residue, rinsing with deionized water for 3-5 times, drying at 60-70 degrees C for 20-30 minutes, mixing lignin-degrading bacteria modified straw and epichlorohydrin with solid-liquid ratio of 1:10-1:15 in a water bath, heating to 60-70 degrees C, crosslinking for 3-6 hours, mixing crosslinked solid product and 30% mixed alcohol solution of trimethylamine with solid-liquid ratio of 1:10-1:20 in a water bath, reacting at 80-90 degrees C for 2-3 hours, filtering reaction mixture to remove residue, rinsing with deionized water for 3-5 times, and drying at 60-70 degrees C for 20-30 minutes.