The invention discloses an organic slow-release compound fertilizer for paddy rice soil purification. The materials of the organic slow-release compound fertilizer for paddy rice soil purification include dried pond mud, peanut bran, corn straws, soybean meal, distiller's grains, mushroom dregs, pig manure, cater cakes, medical stone powder, shell powder, chitin, fishbone powder, urea, ammonium nitrate, monopotassium phosphate, urea phosphate, calcium superphosphate, ammonium dihydrogen phosphate, potassium sulfate, magnesium-potassium sulfate, ammonium molybdate, thiourea, potassium nitrate, paclobutrazol, ethylene-chlormequat-potassium, modified slow-release agent and soil-purifying additive. The organic slow-release compound fertilizer disclosed by the invention has excellent slow-release property, and can purify the environment of paddy rice-growing soil and increase the yield and quality of paddy rice.