NOVELTY - Multifunctional bioorganic composite coated fertilizer comprises rye bran, sugar residue, stir-fried soybean powder, potassium chloride, urea, hydrated potassium aluminum sulfate, citric acid, aluminum sulfate, bamboo charcoal, starch ether, fructus Quisqualis powder, diammonium phosphate, effective microorganism, chinaberry bark powder, soil modifying agent and water, where the soil modifying agent contains long oil alkyd resin, nanocarbon powder, sodium silicate, methyl methacrylate, selenium yeast, copper, zinc, magnesium chloride and ammonium citrate.    USE - The multifunctional bioorganic composite coated fertilizer is useful for controlling insects.    ADVANTAGE - The multifunctional bioorganic composite coated fertilizer promotes absorption of nutrients by the plant, is required in reduced dose and environmentally-friendly, enables slow release of nutrients, and prolongs fertilizer effect.    DETAILED DESCRIPTION - Multifunctional bioorganic composite coated fertilizer comprises 65-69 pts. wt. rye bran, 56-59 pts. wt. sugar residue, 35-40 pts. wt. stir-fried soybean powder, 15-19 pts. wt. potassium chloride, 29-33 pts. wt. urea, 3-5 pts. wt. hydrated potassium aluminum sulfate, 1-2 pts. wt. citric acid, 2-4 pts. wt. aluminum sulfate, 8-10 pts. wt. bamboo charcoal, 2-3 pts. wt. starch ether, 2-4 pts. wt. fructus Quisqualis powder, 22-25 pts. wt. diammonium phosphate, 5-7 pts. wt. effective microorganism, 3-4 pts. wt. chinaberry bark powder, 7-9 pts. wt. soil modifying agent and water (suitable quantity), where the soil modifying agent comprises 10-20 pts. wt. long oil alkyd resin, 1-2 pts. wt. nanocarbon powder, 4-5 pts. wt. sodium silicate, 17-19 pts. wt. methyl methacrylate, 3-4 pts. wt. selenium yeast, 2-3 pts. wt. copper, 2-3 pts. wt. zinc, 1-2 pts. wt. magnesium chloride, 2-3 pts. wt. ammonium citrate, 1-2 pts. wt. boric acid, 4-6 pts. wt. dipentaerythritol hexaacrylate, 30-40 pts. wt. vinegar, 2-3 pts. wt. chitosan, 1-2 pts. wt. Eucalyptus oil, 3-5 pts. wt. tri(propylene glycol) diacrylate, 5-6 pts. wt. hydrated potassium aluminum sulfate and 1-2 pts. wt. iron ore residue and is prepared by mixing methyl methacrylate, dipentaerythritol hexaacrylate, tri(propylene glycol) diacrylate and long oil alkyd resin, nanocarbon powder, Eucalyptus oil and iron ore residue, heating at 65-75 degrees C, forming a mixture, then mixing with the remaining raw materials except vinegar, then adding the vinegar, and dispersing into slurry at high speed to obtain product. An INDEPENDENT CLAIM is included for method for preparing the multifunctional bioorganic composite coated fertilizer, which involves mixing the potassium chloride, hydrated potassium aluminum sulfate, citric acid, aluminum sulfate, bamboo charcoal and diammonium phosphate, adding water, mixing uniformly, adding the soil modifying agent, starch ether, fructus Quisqualis powder and chinaberry bark powder, stirring uniformly to form a slurry, drying to prepare granule, mixing the remaining raw materials except the urea, maintaining the water content to 44-50%, stirring uniformly, sealing, fermenting at room temperature under anaerobic condition for 21-30 days, turning once in every 3-5 days, drying to prepare granule, mixing the obtained granules with the urea, cooling to room temperature and drying to obtain product.