NOVELTY - Coated fertilizer composition is prepared using cottonseed hulls, bran, corncob, light calcium carbonate, chromium(III) chloride, manganese(II) chloride, blast furnace residue powder, effective microorganism (EM) inoculant, calcium pantothenate, borax, urea, ferrous sulfate, sodium molybdate, soil improving agent, and water. The soil improving agent contains feather meal, nanocarbon powder, sodium metasilicate, methyl methacrylate, selenium yeast, zinc gluconate, magnesium chloride, ammonium molybdate, boric acid, edible vinegar and chitosan.    USE - The coated fertilizer composition is useful for winter wheat (claimed).    ADVANTAGE - The coated fertilizer composition contains comprehensive and balanced nutrients, has improved utilization rate and sustained-release effect due to presence of molten urea coated layer, exhibits synergetic effect due to presence of soil improving agent, promotes absorption of nutrients by plants, improves soil compaction, and increases yield, quality and economic benefits of winter wheat.    DETAILED DESCRIPTION - Coated fertilizer composition is prepared using 45-49 pts. wt. cottonseed hulls, 56-60 pts. wt. bran, 55-59 pts. wt. corncob, 10-12 pts. wt. light calcium carbonate, 1-2 pts. wt. chromium(III) chloride, 1-2 pts. wt. manganese(II) chloride, 12-14 pts. wt. blast furnace residue powder, 6-8 pts. wt. effective microorganism (EM) inoculant, 1-2 pts. wt. calcium pantothenate, 1-2 pts. wt. borax, 26-30 pts. wt. urea, 2-3 pts. wt. ferrous sulfate, 1-2 pts. wt. sodium molybdate, 7-9 pts. wt. soil improving agent, and suitable amount of water. The soil improving agent comprises 10-20 pts. wt. feather meal, 1-2 pts. wt. nanocarbon powder, 4-5 pts. wt. sodium metasilicate, 17-19 pts. wt. methyl methacrylate, 3-4 pts. wt. selenium yeast, 2-3 pts. wt. calcium pantothenate, 2-3 pts. wt. zinc gluconate, 1-2 pts. wt. magnesium chloride, 2-3 pts. wt. ammonium molybdate, 1-2 pts. wt. boric acid, 4-6 pts. wt. dipentaerythritol hexaacrylate, 30-40 pts. wt. edible vinegar, 2-3 pts. wt. chitosan, 1-2 pts. wt. Eucalyptus oil, 1-2 pts. wt. zinc oxide, 3-4 pts. wt. wollastonite powder, 10-12 pts. wt. sodium alginate powder, and 3-5 pts. wt. chlorinated paraffin. Preparation method of the soil improving agent, involves (a) mixing methyl methacrylate, dipentaerythritol hexaacrylate, chlorinated paraffin, feather meal, nanocarbon powder, Eucalyptus oil, zinc oxide, wollastonite powder and sodium alginate powder uniformly, and heating mixture to 65-75 degrees C, (b) mixing remaining components and stirring mixture uniformly, and (c) mixing mixtures obtained in the steps (a) and (b), and subjecting obtained mixture to high speed dispersion to obtain slurry. An INDEPENDENT CLAIM is included for preparation method of the above-mentioned coated fertilizer composition, which involves (d) mixing light calcium carbonate, chromium(III) chloride, manganese(II) chloride, calcium pantothenate, borax, ferrous sulfate and sodium molybdate, adding suitable amount of warm water to obtained mixture, stirring mixture uniformly, adding soil improving agent and blast furnace residue powder to the mixture, stirring mixture continuously and uniformly, subjecting the mixture to high speed dispersion to obtain slurry, concentrating slurry, drying concentrate and granulating dried concentrate, (e) mixing remaining components uniformly except urea, maintaining water content of obtained mixture at 45-50%, stirring mixture uniformly, sealing stirred mixture, subjecting the mixture to anaerobic fermentation under sealed condition at room temperature for 21-28 days, turning fermenting mixture once every 4-5 days, drying fermented product and granulating dried product, and (f) heating urea until starts melting, mixing molten urea and granules obtained in the steps (d) and (e) uniformly, cooling mixture to room temperature, and drying cooled product.