NOVELTY - Controlled release fertilizer comprises 3-35 pts. wt. plant ash, 20-25 pts. wt. river sand, 45-55 pts. wt. humic acid, 70-80 pts. wt. straw, 60-80 pts. wt. peanut cake, 35-45 pts. wt. sheep manure, 2-3 pts. wt. microbial inoculum, 1-12 pts. wt. potassium sulfate, 8-10 pts. wt. urea, 6-7 pts. wt. calcium phosphate, 5-7 pts. wt. ammonium chloride, 1-4 pts. wt. calcium superphosphate, 8-12 pts. wt. alkyd resin, 2-3 pts. wt. ethylene glycol, 3-4 pts. wt. sodium dodecylbenzene sulfonate, 4-5 pts. wt. crosslinking agent and a required amount of water.    USE - The controlled release fertilizer is useful for controlling insects.    DETAILED DESCRIPTION - Controlled release fertilizer comprises 3-35 pts. wt. plant ash, 20-25 pts. wt. river sand, 45-55 pts. wt. humic acid, 70-80 pts. wt. straw, 60-80 pts. wt. peanut, 35-45 pts. wt. sheep manure, 2-3 pts. wt. microbial inoculum, 1-12 pts. wt. potassium sulfate, 8-10 pts. wt. urea, 6-7 pts. wt. calcium phosphate, 5-7 pts. wt. ammonium chloride, 1-4 pts. wt. calcium superphosphate, 8-12 pts. wt. alkyd resin, 2-3 pts. wt. ethylene glycol, 3-4 pts. wt. sodium dodecylbenzene sulfonate, 4-5 pts. wt. crosslinking agent and a required amount of water. The crosslinking agent comprises 2-3 pts. wt. butyl acrylate, 3-5 pts. wt. tributyl citrate, 2-3 pts. wt. rosin powder, 5-7 pts. wt. green cucumber powder, 1- 2 pts. wt. N,N-methylenebisacrylamide, 4-5 pts. wt. ethyl alcohol, 1-2 pts. wt. shellac powder and a required amount of water. The crosslinking agent is prepared by adding ethyl alcohol and water in a ratio of 1:3, then adding rosin powder, butyl acrylate, N,N-methylenebisacrylamide and tributyl citrate, heating the mixture at 7-90 degrees C and stirring, adding shellac powder, and water and stirring uniformly, and heating the mixture for 30 minutes. An INDEPENDENT CLAIM is included for preparation of the controlled release fertilizer, comprising: (a) mixing the plant ash, river sand, humic acid, straw, peanut and sheep manure, after drying, crushing the mixture into powder with 140 meshes, then adding microbial inoculum with water and mixing at 38-43 degrees C, fermenting the mixture for 16-20 days and stirring the mixture for once every 2 days; (b) mixing potassium sulfate, urea, calcium superphosphate, ammonium chloride and calcium superphosphate, adding 5 times water of with the mixture, after stirring, heating the mixture, then adding alkyd resin, sodium dodecyl benzene sulfonate, and the crosslinking agent, and continuously heating and stirring the mixture for 15 minutes; and (3) crushing the mixture and heating for 40 minutes, naturally cooling the mixture, after solidification, crushing the mixture, and then fermenting to obtain the finished product.