The invention discloses heat-resistant spheroidal graphite cast iron. The heat-resistant spheroidal graphite cast iron comprises the following chemical components of, by weight,2.7-3.5% of carbon, 1.9-2.3% of silicon, 0.2-0.3% of manganese, 0.3-0.06% of magnesium, 0.2-0.3% of tungsten, 0.6-0.9% of nickel, 0.1-0.5% of titanium, 0.04-0.08% of rare earth, less than or equal to 0.04% of P, less than or equal to 0.02% of S, the balance Fe and inevitable impurities. According to the cast iron, through the steps of smelting, casting, heat treatment and the like, the heat-resistant spheroidal graphitecast iron is prepared by comprising the reasonable technology parameter improvement and a formula, the prepared spheroidal graphite cast iron is good in heat resistance, and further good in mechanical property.