NOVELTY - Controlled release fertilizer comprises 4-45 pts. wt. vegetable slag, 28-35 pts. wt. sawdust, 20-22 pts. wt. sodium alginate, 15-18 pts. wt. sand, 30-35 pts. wt. melon peel, 20-24 pts. wt. rapeseed, 25-28 pts. wt. human and animal urine, 2-3 pts. wt. biological strain, 8-10 pts. wt. fine silicon glue, 4-6 pts. wt. potassium iodide, 8-10 pts. wt. ammonium sulfate, 6-8 pts. wt. ammonium carbonate, 1-2 pts. wt. sodium phosphate, 3-4 pts. wt. calcium peroxide, 8-10 pts. wt. alkyd resin, 2-3 pts. wt. ethyl alcohol, 4-5 pts. wt. crosslinking agent and proper amount of water.    USE - The controlled release fertilizer is useful for cabbage.    DETAILED DESCRIPTION - Controlled release fertilizer comprises 4-45 pts. wt. vegetable slag, 28-35 pts. wt. sawdust, 20-22 pts. wt. sodium alginate, 15-18 pts. wt. sand, 30-35 pts. wt. melon peel, 20-24 pts. wt. rapeseed, 25-28 pts. wt. human and animal urine, 2-3 pts. wt. biological strain, 8-10 pts. wt. fine silicon glue, 4-6 pts. wt. potassium iodide, 8-10 pts. wt. ammonium sulfate, 6-8 pts. wt. ammonium carbonate, 1-2 pts. wt. sodium phosphate, 3-4 pts. wt. calcium peroxide, 8-10 pts. wt. alkyd resin, 2-3 pts. wt. ethyl alcohol, 3-4 pts. wt. sodium dodecylbenzenesulfonate, 4-5 pts. wt. crosslinking agent and proper amount of water. The crosslinking agent comprises 2-3 pts. wt. butyl acrylate, 3-5 pts. wt. tributyl citrate, 2-3 pts. wt. colophony powder, 5-7 pts. wt. green cucumber powder, 1-2 pts. wt. N,N-methylene-bisacrylamide, 4-5 pts. wt. ethyl alcohol, 2 pts. wt. shellac powder and proper amount of water. The crosslinking agent is prepared by adding ethyl alcohol and water in a ratio of 1:3 and diluting, adding rosin powder, butyl acrylate, N,N-methylene-bisacrylamide and tributyl citrate, heating the mixture at 7-90 degrees C and stirring, mixing the shellac powder, adding water and stirring the mixture uniformly, and then heating for 30 minutes. An INDEPENDENT CLAIM is included for a preparation of the controlled release fertilizer, comprising mixing the vegetable slag, sawdust, sodium alginate, sand, melon peel, rape seed, human and animal urine, crushing the mixture into powder of 140 meshes, adding water with 10 times of dilution of biological strain, mixing after adjusting the water content of the mixture is 30%, and fermenting the mixture at 42-46 degrees C for 20-25 days, adding potassium iodide, ammonium sulfate, ammonium carbonate, sodium phosphate and calcium peroxide, adding 5 times water of the total weight, after stirring, then adding alkyd resin, sodium dodecylbenzenesulfonate, ethyl alcohol, and crosslinking agent, continuously heating for 15 minutes, stir heating the mixture for 40 minutes, naturally cooling after solidification, then crushing into 20 meshes resin granule, and fermenting the mixture to obtain the final product.