Fertilizer with saving synergistic formula

The invention belongs to a fertilizer field, concretely a fertilizer with a saving synergistic formula. The fertilizer with the saving synergistic formula is prepared by the following raw materials by weight: 402-587 parts of polyaspartic acid coated urea, 136-273 parts of monoammonium phosphate, 100-200 parts of potassium chloride, and 1-3 parts of microbial flora pulvis; wherein the a weight ratio of urea with big granules to polyaspartic acid of the polyaspartic acid coated urea is 1000:3-5. A fertilizer product can raises a fertilizer utilization rate, saves raw materials, prolongs a fertilizer release period, and reduces artificial investment and agricultural production cost. Simultaneously, the fertilizer product can raises crop output, maintains quality safety of agricultural products, reduces fertilizer pollution on environment, protects ecological environment, accelerates development of modern agriculture, and increases peasant income.