The ore blending of sintering, pelletizing and ironmaking processes will directly affect its technological process, product quality, and even whether the blast furnace smelting goes smoothly or not. Traditional sintering, pelletizing and ironmaking ore blending are relatively simple with such disadvantages as inaccurate prediction, too long optimization cycle, and out of the whole process calculation. Based on the comprehensive consideration of blast furnace production requirements, a "sintering-pelletizing-ironmaking" model design of linkage ore blending is established, which can provide a comprehensive ore blending method based on the optimal cost of molten iron, and which have broken the existing status quo of accounting sintering, pelletizing, and ironmaking in isolation, overemphasizing partial cost reduction and ignoring the overall cost reduction. Practice has proved that this model can effectively reduce the overall cost of molten iron production while ensure the quality of molten iron, and avoid the occurrence of mass excess.