A method for preparing a sustained-release compound fertilizer

The present invention relates to a method for preparing a fertilizer, in particular, relates to a method for preparing sustained-release fertilizer, the method comprising the steps of: a binder in a liquid formulation, the decomposition of organic fertilizer, urea, a phosphate blending ammonium, potassium and granulated together, parts by mass of the raw material: decomposed manure 38 to 48 parts, 21 to 27 parts of a liquid binder, 13 to 17 parts of urea, 13 parts of monoammonium 9 ~ , 6-8 parts of potassium sulfate; the present invention is low cost, simple production process, can effectively prevent the loss of nitrogen, nutrient slow release, long period, good fertilizer.