NOVELTY - Plant root growth-promoting coated fertilizer comprises 54-59 pts. wt. slag, 10-14 pts. wt. bentonite, 9-12 pts. wt. stone powder, 8-11 pts. wt. calcium carbonate powder, 4-6 pts. wt. magnesium sulfate, 13-15 pts. wt. triacetin, 67-74 pts. wt. earthworm manure, 56-60 pts. wt. dairy manure, 10-13 pts. wt. grass, 10-12 pts. wt. perlite powder, 1-2 pts. wt. ammonium molybdate, 1-2 pts. wt. zinc borate, 8-10 pts. wt. soil modifying agent and water.    USE - Plant root growth-promoting coated fertilizer.    ADVANTAGE - The plant root growth-promoting coated fertilizer has enhanced nutrients by the use of dregs, earthworm manure, dairy manure and inorganic fertilizers. It has slow-release fertilizer effect, stable chemical property, safety, simple production and low cost, does not contain toxic and harmful substances and is environment-friendly and suitable for large-scale preparation.    DETAILED DESCRIPTION - Plant root growth-promoting coated fertilizer comprises 54-59 pts. wt. slag, 10-14 pts. wt. bentonite, 9-12 pts. wt. stone powder, 8-11 pts. wt. calcium carbonate powder, 4-6 pts. wt. magnesium sulfate, 13-15 pts. wt. triacetin, 67-74 pts. wt. earthworm manure, 56-60 pts. wt. dairy manure, 10-13 pts. wt. grass, 10-12 pts. wt. perlite powder, 1-2 pts. wt. ammonium molybdate, 1-2 pts. wt. zinc borate, 8-10 pts. wt. soil modifying agent and water. The soil modifying agent comprises 10-20 pts. wt. bamboo charcoal, 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, 2-3 pts. wt. zinc, 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, 2-3 pts. wt. citric acid, 1-2 pts. wt. nano-titanium dioxide, 2-3 pts. wt. ammonium sulfate and 1-2 pts. wt. methyltriethoxysilane. It is prepared by uniformly mixing methyl methacrylate, dipentaerythritol hexaacrylate, bamboo charcoal, nano-carbon powder, Eucalyptus oil, nano-titanium dioxide, ammonium sulfate and methyltriethoxysilane by stirring to obtain mixture A, mixing the rest components by stirring to obtain edible vinegar solution, mixing the mixture A with edible vinegar solution, and high speed dispersing into slurry to obtain the product. An INDEPENDENT CLAIM is included for preparation of plant root growth-promoting coated fertilizer comprising adding bentonite, stone powder, calcium carbonate powder, magnesium sulfate, perlite powder, ammonium molybdate and zinc borate with warm water, uniformly mixing, adding soil modifying agent, continuously stirring uniformly, concentrating and drying to prepare granules, uniformly mixing the residual components except triacetin, keeping the water content at 40-50%, uniformly stirring, subjecting to sealed anaerobic fermentation at low temperature for 24-30 days, turning once per 3-4 days, drying, powdering, mixing with triacetin and granules, uniformly mixing and curing at normal temperature to obtain the product.