NOVELTY - A Chinese chestnut composite coated fertilizer comprises 89-100 pts. wt. castor oil cake, 25-34 pts. wt. wood chips, 18-24 pts. wt. wood fiber, 28-33 pts. wt. monoammonium phosphate, 33-40 pts. wt. potassium chloride, 2-3 pts. wt. magnesium sulfate, 1-2 pts. wt. humic acid chelated manganese, 9-12 pts. wt. nano bentonite, 8-11 pts. wt. acid potassium chloride, 26-32 pts. wt. urea, 30-36 pts. wt. groove, 28-34 pts. wt. grass, 5-7 pts. wt. EM, 8-10 pts. wt. soil improving agent, and water.    USE - Chinese chestnut composite coated fertilizer.    ADVANTAGE - The fertilizer promotes absorption of nutrition, improves soil condition, preserves moisture and fertility, promotes chestnut tree growth, and has stable yield.    DETAILED DESCRIPTION - Chinese chestnut composite coated fertilizer comprises 89-100 pts. wt. castor oil cake, 25-34 pts. wt. wood chips, 18-24 pts. wt. wood fiber, 28-33 pts. wt. monoammonium phosphate, 33-40 pts. wt. potassium chloride, 2-3 pts. wt. magnesium sulfate, 1-2 pts. wt. humic acid chelated manganese, 9-12 pts. wt. nano bentonite, 8-11 pts. wt. acid potassium chloride, 26-32 pts. wt. urea, 30-36 pts. wt. groove, 28-34 pts. wt. grass, 5-7 pts. wt. EM, 8-10 pts. wt. soil improving agent, and water. The soil modifying agent comprises 10-12 pts. wt. bamboo charcoal, 1-2 pts. wt. nanocarbon powder, 4-5 pts. wt. sodium metasilicate, 17-19 pts. wt. methyl methacrylate, 3-4 pts. wt. yeast selenium, 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, 2-3 pts. wt. citric acid, 1-2 pts. wt. nanotitanium dioxide, 2-3 pts. wt. ammonium sulfate, and 1-2 pts. wt. methyl triethoxysilane. It is prepared by mixing methyl methacrylate, dipentaerythritol hexaacrylate, bamboo charcoal, nanocarbon powder, eucalyptus oil, nanotitanium dioxide, ammonium sulfate, and methyl triethoxysilane, stirring to form uniform mixture, adding the rest of materials, stirring to form vinegar solution, and high speed dispersing into slurry to obtain the product. An INDEPENDENT CLAIM is included for preparing the fertilizer comprising mixing mono-ammonium phosphate, potassium chloride, magnesium sulfate, humic acid chelate manganese, nano bentonite, and potassium polyaspartic acid; adding soil modifying agent, continuing to stir to obtain slurry, and drying to prepare granule; removing the rest of component other than urea, holding water content at 40-45%, fermenting for 25-30 days, turning one time per 3-5 days, drying, and crushing into particles; and cooling to obtain the product.