The invention belongs to the field of nodular cast iron, and discloses a production technology of a ductile cast iron cylinder seat. The technology is characterized in that molten iron is poured intoa casting mold to form the cylinder seat; the pouring temperature of the molten iron is 1340-1360 DEG C, and profile-followed cold iron is uniformly distributed on the inner wall of a cylinder; a sectional area ratio of a down sprue to a cross gate to an ingate of a pouring system is (1.2-1.4):(1.1-1.2):1; the filling speed is 100-150 Kg/second; the pouring process is a rising pouring manner; andthe molten iron comprises 3.65-3.75% of C, 2.20-2.30% of Si, 0.15-0.25% of Mn, 0.015% or less of P, 0.008-0.015% of S, 0.012% or less of Ti, 0.010% or less of Cr, 0.015% or less of (Zn + Pb + V), 0.0050-0.0070% of RE, 0.035-0.045% of Mg, and the balance of iron and inevitable impurities. The service life of the nodular cast iron cylinder seat produced through the technology is prolonged to 48 months or above from 18-24 months.