NOVELTY - Controlled release fertilizer comprises 3-35 pts. wt. rice water, 20-22 pts. wt. reed straw, 12-14 pts. wt. dried leaves, 10-13 pts. wt. silica sand, 12-15 pts. wt. rice bran, 16-20 pts. wt. peat, 3-5 pts. wt. quicklime, 2-3 pts. wt. effective microorganism, 3-5 pts. wt. ammonium sulfate, 8-10 pts. wt. calcium magnesium phosphate fertilizer, 5-7 pts. wt. potassium sulfate, 6-7 pts. wt. sodium phosphate, 2-3 pts. wt. isopropanol, 7-8 pts. wt. alcohol-formaldehyde resin, 2-3 pts. wt. sodium dodecylbenzenesulfonate, 4-5 pts. wt. crosslinking agent and water.    USE - The controlled release fertilizer is useful for cultivating soybean (claimed).    ADVANTAGE - The controlled release fertilizer has high nutritional content, and is stable, suitable for long-term use, environmentally-friendly and decomposed easily.    DETAILED DESCRIPTION - Controlled release fertilizer comprises 3-35 pts. wt. rice water, 20-22 pts. wt. reed straw, 12-14 pts. wt. dried leaves, 10-13 pts. wt. silica sand, 12-15 pts. wt. rice bran, 16-20 pts. wt. peat, 3-5 pts. wt. quicklime, 2-3 pts. wt. effective microorganism, 3-5 pts. wt. ammonium sulfate, 8-10 pts. wt. calcium magnesium phosphate fertilizer, 5-7 pts. wt. potassium sulfate, 6-7 pts. wt. sodium phosphate, 2-3 pts. wt. isopropanol, 7-8 pts. wt. alcohol-formaldehyde resin, 2-3 pts. wt. sodium dodecylbenzenesulfonate, 4-5 pts. wt. crosslinking agent and water (suitable quantity). 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. cucumber powder, 1-2 pts. wt. N,N-methylenebisacrylamide, 4-5 pts. wt. ethanol, 1-2 pts. wt. shellac and water (suitable quantity). The crosslinking agent is prepared by mixing the ethanol and water in a ratio of 1:3 to obtain a ethanol solution, adding the rosin powder, butyl acrylate, N,N-methylenebisacrylamide and tributyl citrate to the ethanol solution, heating at 70-90 degrees C under condition of stirring to dissolve, obtaining a solution (S1), mixing the remaining raw materials, adding 10 times water, mixing and stirring uniformly to obtain a solution (S2), mixing the obtained solution (S1) and solution (S2), uniformly, and concentrating under condition of heating for 30 minutes to obtain product. An INDEPENDENT CLAIM is included for method for preparing the controlled release fertilizer, which involves cutting the reed straw and dried leaves, crushing into powder, mixing the powder with the rice water and quicklime, mixing and stirring uniformly, maintaining under static condition for 4 days, crushing to obtain powder (P1) of 140 mesh size, adding effective microorganism in 10 times water, diluting, mixing with rice bran and peat, regulating water content to 3-35%, fermenting at 38-44 degrees C for 20-24 days under condition of stirring once in every 2 days to obtain fermented mixture, mixing the ammonium sulfate, calcium-magnesium phosphate fertilizer, potassium sulfate and sodium phosphate, adding 5 times water, mixing and stirring uniformly under condition of heating to dissolve completely, then adding the isopropanol, alcohol-formaldehyde resin, sodium dodecylbenzenesulfonate and crosslinking agent, continuously heating and stirring for 10-15 minutes to obtain a solution, mixing the solution with the silica sand, stirring under condition of heating for 10-40 minutes, naturally cooling after solidification, crushing into granules of 20 mesh size, mixing the granules with the fermented mixture, regulating water content to 30% and obtaining product.