Abstract: The technique of producing Cr12 high alloy die steel by the traditional recirculating metal oxygen lancing process was introduced. By analyzing the merits and the disadvantage of the traditional process and the smelting characteristics of the "EBT + LF" two-step process, the feasibility of producing Cr12 die steel by the new oxidizing process was defined. By reasonable arranging EAF production and summing-up the various pro-duction requirements, the existing difficulties of the new technology were gradually resolved. The results of product quality testing show that by using the oxidizing process, the components of Cr12 die steel are stable and the end-point hit rate is high, which is conducive to maintaining the stability of product quality. Compared with the traditional process, the oxidation smelting of Cr12 die steel brings obvious economic benefits, and the total efficiency reaches 787 RMB/t.