NOVELTY - A composite fertilizer comprises 60-67 pts. wt. banana peel, 45-47 pts. wt. bran, 30-34 pts. wt. sawdust, 27-29 pts. wt. urea, 1-2 pts. wt. ammonium citrate, 15-19 pts. wt. potassium sulfate, 1-2 pts. wt. magnesium sulfate, 3-5 pts. wt. glycerin, 3-5 pts. wt. agar powder, 16-19 pts. wt. ammonium phosphate dibasic, 9-11 pts. wt. corn, 7-9 pts. wt. lime powder, 6-8 pts. wt. EM agent, 7-9 pts. wt. modifying agent and proper amount of water, where the modifying agent comprises alkyd resin, nano-carbon powder, sodium silicate, methyl methacrylate, selenium yeast, copper sulfate and zinc gluconate.    USE - Composite fertilizer.    ADVANTAGE - The composite fertilizer has multi-mineral nutrition and effect of promoting plant absorbing nutrition in simple and cost effective manner.    DETAILED DESCRIPTION - A composite fertilizer comprises 60-67 pts. wt. banana peel, 45-47 pts. wt. bran, 30-34 pts. wt. sawdust, 27-29 pts. wt. urea, 1-2 pts. wt. ammonium citrate, 15-19 pts. wt. potassium sulfate, 1-2 pts. wt. magnesium sulfate, 3-5 pts. wt. glycerin, 3-5 pts. wt. agar powder, 16-19 pts. wt. ammonium phosphate dibasic, 9-11 pts. wt. corn, 7-9 pts. wt. lime powder, 6-8 pts. wt. EM agent, 7-9 pts. wt. modifying agent and proper amount of water, where the modifying agent comprises 10-20 pts. wt. alkyd resin, 1-2 pts. wt. nano-carbon powder, 4-5 pts. wt. sodium silicate, 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 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, 3-5 pts. wt. tripropylene glycol diacrylate, 5-6 pts. wt. alum and 1-2 pts. wt. iron ore slag, and the modifying agent is prepared by mixing methyl methacrylate, dipentaerythritol hexa-acrylate, tripropylene glycol diacrylate, alkyd resin, nano-carbon powder, Eucalyptus oil, iron ore slag uniformly, heating at 65-75 degrees C to obtain a mixture, followed by adding remaining materials in the obtained mixture, stirring with vinegar and dispersing in high speed to obtain the finished product. An INDEPENDENT CLAIM is also included for a method for preparing composite fertilizer, which involves mixing ammonium citrate, potassium sulfate, magnesium sulfate, glycerin, agar powder and ammonium phosphate dibasic in proper amount of warm water uniformly, adding modifying agent, corn flour and lime powder, stirring uniformly, dispersing at high speed to obtain slurry, drying, mixing remaining materials uniformly except urea, maintaining 41-45% moisture content, followed by stirring, sealing, allowing for anaerobic fermentation at room temperature for 21-28 days, drying once in 3-5 days, granulating to obtain granules, melting urea by heating, mixing the melted urea in the obtained slurry and granules uniformly, cooling at room temperature and drying to obtain the finished product.