NOVELTY - Coated fertilizer comprises 45-49 pts. wt. corn straw, 2-4 pts. wt. bone powder, 34-38 pts. wt. soybean meal, 13-19 pts. wt. peptone, 8-12 pts. wt. weathered coal, 11-18 pts. wt. bamboo carbon, 0.04-0.06 pts. wt. Bacillus natto, 1-3 pts. wt. alum, 1-3 pts. wt. polylactic acid, 12-15 pts. wt. Furfural residue, 0.4-1.4 pts. wt. potassium polyacrylate, 13-15 pts. wt. potassium sulfate, 8-13 pts. wt. carbamide, 18-23 pts. wt. monoammonium phosphate, 0.2-0.4 pts. wt. dicyandiamide, 1-2 pts. wt. pentaerythritol and 7-9 pts. wt. soil modifying agent.    USE - Coated fertilizer used for blueberry (claimed).    ADVANTAGE - The coated fertilizer retains water in soil, is biodegradable and drought-resistant, improves soil fertility, prevents loss of soil nutrients, increases soil fertility, releases nutrients slowly into soil, provides microelement to blueberry, and has soil loosening effect.    DETAILED DESCRIPTION - Coated fertilizer comprises 45-49 pts. wt. corn straw, 2-4 pts. wt. bone powder, 34-38 pts. wt. soybean meal, 13-19 pts. wt. peptone, 8-12 pts. wt. weathered coal, 11-18 pts. wt. bamboo carbon, 0.04-0.06 pts. wt. Bacillus natto, 1-3 pts. wt. alum, 1-3 pts. wt. polylactic acid, 12-15 pts. wt. Furfural residue, 0.4-1.4 pts. wt. potassium polyacrylate, 13-15 pts. wt. potassium sulfate, 8-13 pts. wt. carbamide, 18-23 pts. wt. monoammonium phosphate, 0.2-0.4 pts. wt. dicyandiamide, 1-2 pts. wt. pentaerythritol, 7-9 pts. wt. soil modifying agent, 6-10 pts. wt. effective microorganism inoculum and balanced amount of water. The soil modifying agent comprises 1-2 pts. wt. lentinan, 30-38 pts. wt. peat, 0.5-1.0 pts. wt. polyaspartic acid, 0.5-0.7 pts. wt. magnesium sulfate, 0.1-0.2 pts. wt. calcium chloride, 0.6-0.8 pts. wt. ferrous sulfate, 0.1-0.2 pts. wt. selenium yeast, 0.5-0.7 pts. wt. manganese sulfate, 0.5-0.8 pts. wt. sodium, 0.01-0.02 pts. wt. gibberellin, 0.04-0.06 pts. wt. cytokinin, 0.06-0.08 pts. wt. paclobutrazol, 2-3 pts. wt. humic acid, 0.4-0.8 pts. wt. gelatin, 1-2 pts. wt. ethylene glycol dimethyl ether, 6-9 pts. wt. chitin and 9-13 pts. wt. smectite powder. The soil modifying agent is prepared by drying and crushing magnesium sulfate, calcium chloride, ferrous sulfate, selenium yeast, manganese sulfate, sodium and smectite powder, and then mixed and stirred uniformly with peat to obtain a mixture. The mixture is mixed uniformly with remaining material, and then ground to obtain granules. The granules are dried at normal temperature and cooled to obtain the soil modifying agent. An INDEPENDENT CLAIM is included for a method for preparing coated fertilizer, which involves:    (A) mixing uniformly corn straw, bone meal, soybean meal, cotton seed powder, furfural slag, bamboo carbon and effective microorganism inoculum with 43-46% water, and then stirring uniformly and sealing through normal process without oxygen supplying system;    (B) performing fermentation for 23-29 days in presence of Bacillus natto, adding alum, potassium sulfate, monoammonium phosphate and dicyandiamide, and then dispersing and granulating in a granulator to obtain granule;    (C) coating the granule by using a fluidized-bed coating machine at 70-100 degrees C, and then adding urea, pentaerythritol, potassium polyacrylate and polylactic acid by atomizing and spraying on surface of the granule; and    (D) drying coated granule at normal temperature, and then cooling to obtain a final product.