Anti-blocking fertilizer and preparation method therefor

The invention discloses an anti-blocking fertilizer and a preparation method therefor. Raw materials of the fertilizer comprises the components in percentage by weight: 93-99% of a fertilizer core and 0.5-4% of a synergist, wherein the fertilizer core is a composite fertilizer or a compound fertilizer; the synergist is selected from one or more of zinc oxide, magnesium oxide, manganese oxide and ferric oxide; the synergist is wrapped on the surface of the fertilizer core, and material isolation is formed between fertilizer particles and fertilizer particles. The anti-blocking fertilizer disclosed by the invention is not blocked in granulating and storing processes. The fertilizer efficiency of the fertilizer during use is long, and moreover, the fertilizer can provide various elements for crops at the same time and is low in cost.