The invention discloses a preparing method for high-wear-resistance nodular cast iron. The high-wear-resistance nodular cast iron comprises, by weight, 3.5-3.6% of carbon, 2-2.2% of silicon,0.5-0.6% of manganese, 0.2-0.3% of vanadium, 0.6-0.8% of tungsten, 0.02-0.04% of antimony, 0.5-0.6% of molybdenum, 0.01-0.04% of rare earth, 0.04% or below of phosphorus, 0.01% or below of sulphur and the balance Fe and unavoidable impurities. The high-wear-resistance nodular cast iron is prepared through smelting, pouring, heat treatment and the like, nodular cast iron prepared through reasonable improvement of technical parameters and compositions is high in wear resistance, and the service life of the nodular cast iron is prolonged.