NOVELTY - Bioorganic compound coated fertilizer is prepared by using hoof and horn powder, bone powder, pork skin powder, ammonium molybdate, borax, zinc sulfate, silicon fertilizer, lignosulfonate, ferric oxide, urea-formaldehyde resin (water-soluble), starch, tallow amine polyoxyethylene ether, diammonium phosphate, potassium persulfate, agent comprising effective microorganisms (EM), soil improving agent and water.    USE - As bioorganic compound coated fertilizer specific for flowers (claimed).    ADVANTAGE - The bioorganic compound coated fertilizer effectively provides nutrients required for growth of the flower, and long-lasting fertilizer effect, has excellent slow release properties, maximizes effectiveness of fertilizers, saves resources, and is environmentally-friendly, safe and reliable.    DETAILED DESCRIPTION - Bioorganic compound coated fertilizer is prepared by using 54-59 pts. wt. hoof and horn powder, 45-48 pts. wt. bone powder, 32-37 pts. wt. pork skin powder, 1-2 pts. wt. ammonium molybdate, 1-1.5 pts. wt. borax, 1-2 pts. wt. zinc sulfate, 2-3 pts. wt. silicon fertilizer, 2-3 pts. wt. lignosulfonate, 3-4 pts. wt. ferric oxide, 13-15 pts. wt. urea-formaldehyde resin (water-soluble), 3-5 pts. wt. starch, 1-2 pts. wt. tallow amine polyoxyethylene ether, 29-34 pts. wt. diammonium phosphate, 18-24 pts. wt. potassium persulfate, 6-8 pts. wt. agent comprising effective microorganisms (EM), 8-10 pts. wt. soil improving agent and water (suitable quantity). The soil improving agent comprises 10-20 pts. wt. clay, 1-2 pts. wt. nano-carbon powder, 4-5 pts. wt. sodium metasilicate, 17-19 pts. wt. methyl methacrylate, 3-4 pts. wt. selenium yeast, 2-3 pts. wt. copper sulfate, 2-3 pts. wt. zinc gluconate, 1-2 pts. wt. magnesium chloride, 2-3 ammonium citrate, 1-2 boric acid, 4-6 pts. wt. dipentaerythritol hexaacrylate, 35-40 pts. wt. vinegar, 2-3 pts. wt. chitosan, 1-2 pts. wt. Eucalyptus oil, 3-4 pts. wt. hydroxypropyl methacrylate, 3-4 pts. wt. diatomaceous earth and 2-3 pts. wt. methyltriethoxysilane. Preparation method of the soil improving agent, involves mixing the methyl methacrylate, dipentaerythritol hexaacrylate, hydroxypropyl methacrylate, clay, nano-carbon powder, Eucalyptus oil, diatomaceous earth and methyltriethoxysilane uniformly to obtain mixture, adding remaining raw materials except vinegar to the mixture, stirring the mixture, adding vinegar to the mixture and subjecting the mixture to high-speed dispersion to obtain slurry. An INDEPENDENT CLAIM is included for method for preparing the above-mentioned bioorganic compound coated fertilizer, which involves (a) mixing the ammonium molybdate, borax, zinc sulfate, silicon fertilizer, iron oxide, diammonium phosphate and potassium persulfate, adding suitable amount of water to obtained mixture, adding the soil improving agent (half quantity), lignin sulfonate and tallow amine polyoxyethylene ether to obtained mixture, stirring the mixture continuously to obtain slurry, concentrating the slurry, drying concentrate and preparing granules from dried concentrate, (b) adding and mixing urea-formaldehyde resin, starch and remaining other raw materials, maintaining 40-45% moisture content in obtained mixture, stirring the mixture, subjecting the mixture to sealed anaerobic fermentation at room temperature for 22-28 days, turning the mixture once every 3-4 times, drying obtained fermented material, grinding dried fermented material and granulating crushed product, and (c) mixing granules obtained in the steps (a) and (b), subjecting obtained granular mixture to fluidized bed coating machine, where the machine has air inlet temperature of 70-100 degrees C, and air inlet pressure is maintained such that the granules are maintained in the suspension state, dissolving the urea-formaldehyde resin in water, adding and mixing starch with obtained resin solution, heating the solution at 50-55 degrees C, injecting the solution into the fluidized bed coating machine, spray-coating the granular mixture, cooling obtained coated-granules and sieving cooled granules.