The invention relates to a direct current wet-type electromagnet for a valve, and belongs to the technical field of machinery. The direct current wet-type electromagnet for the valve comprises a coil,a guide sleeve, a fixed magnetic pole and an iron core. The iron core is made of silicon steel sheets, and each silicon steel sheet comprises a core part, a transition layer and an insulative corrosion-resistant layer. Each core part is made from silicon steel alloy prepared from, by mass, 0.03-0.05% of C, 3.5-5.5% of Si, 1.1-2.3% of Al, 0.3-0.5% of Mn, 0.05-0.07% of Cr, 0.5-0.8% of Sn, 0.3-0.5%of N, 0.06-0.08% of Mo, 0.08-0.16% of Ga, 0.2-0.6% of Ag, 0.005-0.01% of Gd and the balance iron and inevitable impurities. The direct current wet-type electromagnet for the valve has the advantages of being little in iron loss, resistant to corrosion and long in service life.