The invention relates to a manufacturing method of nodular 
cast iron for high-temperature parts of 
combustion engines, in particular to a manufacturing method of heat-resistant high-
silicon-
molybdenum nodular 
cast iron. The method comprises the following steps that chemical parameters, raw materials and weight percentage compositions are determined, wherein the nodular 
cast iron comprises, by weight, 30 percent-40 percent of 
pig iron, 20 percent-30 percent of 
scrap steel, 30 percent-40 percent of 
foundry returns, 1.5 percent-2.0 percent of 
silicon iron and 1 percent-1.2 percent of 
ferromolybdenum, and 
smelting, modification treatment, aging 
stress relieving technologies are performed. The method is unique, the 
creep resistance and endurance property of the material are improved, the intensity of the material is enhanced, and the service life of the material is prolonged; the influence on the 
graphite form by 
rare earth elements is relieved, the 
graphite roundness is improved, the fragmentation effect of 
graphite is relieved, the manufacturing cost and 
processing costs are reduced, and environmental friendliness and energy saving are facilitated.