Making method for high-purity electroslag steel for hot working die

The invention discloses a making method for high-purity electroslag steel for a hot working die. The making method comprises the procedures of molten iron pretreatment, smelting in a converter, LF refining, RH vacuum degassing, continuous casting and electroslag remelting. In the molten iron pretreatment procedure, after molten iron is subjected to triple removal, final components meet the requirements that Si is less than or equal to 0.015 percent by weight, P is less than or equal to 0.010 percent by weight, S is less than 0.010 percent by weight, and the temperature is 1,300 DEG C. An electroslag steel ingot, in which Cr is greater than or equal to 4.9 percent by weight, Mo is greater than or equal to 1.20 percent by weight and V is greater than or equal to 0.90 percent by weight, produced based on the method and used for the hot working die adopts an alloy with a relatively high Ti content on the premise of not increasing the investment, and furthermore, existing molten iron pretreatment equipment, the co