NOVELTY - Coated fertilizer comprises 80-90 pts. wt. vermicompost, 56-59 pts. wt. traditional Chinese medicinal slag, 45-50 pts. wt. corncob, 19-23 pts. wt. monoammonium phosphate, 17-20 pts. wt. potassium sulfide, 9-11 pts. wt. dolomite, 2-3 pts. wt. Tween-80 (RTM: Polysorbate-80), 3-5 pts. wt. polyaspartic acid, 15-18 pts. wt. rosin glycerol ester, 10-12 pts. wt. calcium superphosphate, 6-8 pts. wt. effective-microorganisms (EM) agents, 7-9 pts. wt. soil modifying agent and water (suitable amount). The soil modifying agent comprises e.g. long oil alkyd resin and sodium metasilicate.    USE - The fertilizer is useful for promoting the absorption of nutrients in plants, and improving soil function.    ADVANTAGE - The fertilizer has comprehensive nutritional content; exhibits synergistic effect; has mild effect, high strength, sustained release effect, and long-term effect; and is not easy to crush, biodegradable, and environmental friendly.    DETAILED DESCRIPTION - Coated fertilizer comprises 80-90 pts. wt. vermicompost, 56-59 pts. wt. traditional Chinese medicinal slag, 45-50 pts. wt. corncob, 19-23 pts. wt. monoammonium phosphate, 17-20 pts. wt. potassium sulfide, 9-11 pts. wt. dolomite, 2-3 pts. wt. Tween-80 (RTM: Polysorbate-80), 3-5 pts. wt. polyaspartic acid, 15-18 pts. wt. rosin glycerol ester, 10-12 pts. wt. calcium superphosphate, 6-8 pts. wt. effective-microorganisms (EM) agents, 7-9 pts. wt. soil modifying agent and water (suitable amount). The soil modifying agent comprises 10-20 pts. wt. long oil-degree alkyd resin, 1-2 pts. wt. nano-carbon powder, 4-5 pts. wt. sodium metasilicate, 17-19 pts. wt. methyl methacrylate, 3-4 pts. wt. yeast selenium, 2-3 pts. wt. copper sulfate, 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. vinegar, 2-3 pts. wt. chitosan, 1-2 pts. wt. eucalyptus oil, 3-5 pts. wt. tripropylene glycol diacrylate, 5-6 pts. wt. alum and 1-2 pts. wt. iron ore slag. The preparation comprises uniformly mixing methyl methacrylate, dipentaerythritol hexaacrylate and long oil-degree alkyd resin with nano-carbon powder, eucalyptus oil and iron slag with stirring, and heating at 65-75 degrees C, molding the mixture, and then mixing with the remaining residual components, completely stirring the mixed liquid by adding vinegar, mixing the mixture with edible vinegar, and carrying out high speed dispersion of slurry to obtain the product. An INDEPENDENT CLAIM is also included for preparing fertilizer, comprising (i) mixing mono-ammonium phosphate, potassium sulfide, calcium superphosphate and dolomite, and adding warm water, uniformly mixing, and adding soil modifying agent, Tween-80 (RTM: Polysorbate-80) and polyaspartic acid, and then continuously-uniformly stirring, to obtain slurry, drying, and concentrating to obtain granules; (ii) uniformly mixing rosin glycerol ester with the other remaining components, maintaining the water content to 41-45%, and uniformly stirring, sealing, fermenting for 21-29 days at room temperature under anaerobic conditions, and turning the mixture once in every 4-5 days, and drying to obtain granules; and (iii) heating rosin glycerol ester to melt, uniformly mixing the granules obtained in the steps (i) and (ii), and cooling to room temperature, and drying to obtain the product.