NOVELTY - An efficient composite fertilizer comprises 10-15 pts. wt. diatomaceous earth, 25-30 pts. wt. coated urea, 20-25 pts. wt. chitosan capsule, 8-10 pts. wt. ammonium dihydrogen phosphate, 2-4 pts. wt. zinc ethylenediaminetetraacetic acid chelate, 10-15 pts. wt. soybean residue, 8-12 pts. wt. detoxified cake, 10-15 pts. wt. water hyacinth powder, 2-4 pts. wt. selenium-rich yeast, 1-2 pts. wt. benzyldimethyldodecylammonium chloride, 2-5 pts. wt. vinegar, 2-5 pts. wt. zinc gluconate, 2-3 pts. wt. nanocarbon and 1-3 pts. wt. seedlings agent.    USE - Efficient composite fertilizer is used for cultivating rice.    ADVANTAGE - The efficient composite fertilizer has excellent nutrient fixing property and durability.    DETAILED DESCRIPTION - An efficient composite fertilizer comprises 10-15 pts. wt. diatomaceous earth, 25-30 pts. wt. coated urea, 20-25 pts. wt. chitosan capsule, 8-10 pts. wt. ammonium dihydrogen phosphate, 2-4 pts. wt. zinc ethylenediaminetetraacetic acid chelate, 10-15 pts. wt. soybean residue, 8-12 pts. wt. detoxified cake, 10-15 pts. wt. water hyacinth powder, 2-4 pts. wt. selenium-rich yeast, 1-2 pts. wt. benzyldimethyldodecylammonium chloride, 2-5 pts. wt. vinegar, 2-5 pts. wt. zinc gluconate, 2-3 pts. wt. nanocarbon and 1-3 pts. wt. seedlings agent. The coated urea comprises cold-soluble polyvinyl alcohol as binder. The diatomaceous earth comprises core coated by coating material particles. The amount of core in diatomaceous earth is 3-4 %mass. The core comprises 20-30 pts. wt. urea, 2-4 pts. wt. antimicrobial peptides and 3-5 pts. wt. chelating selenium. The chitosan capsule is prepared by mixing 5-10 pts. wt. carboxymethyl cellulose and 5-10 pts. wt. polyacrylamide, adding deionized water, completely dissolving by stirring, adding 2-5 pts. wt. plantain leaf pulp and 2-5 pts. wt. ammonium bicarbonate to the resultant product, mixing for 30-35 minutes, adding 15-20 pts. wt. chitosan, 2-4 pts. wt. peptide and 3-5 pts. wt. chelating selenium. An INDEPENDENT CLAIM is included for preparation of efficient composite fertilizer.