In order to determine the combustion rate of semi-coke inside the blast furnace and whether the steel enterprises have economic benefits after adding semi-coke,in thisstudy a new-type simulation experimental device for blast furnace coal injection combustion was used to detect the combustion rate of semi-coke in the blast furnace and additionally the energyand quality balance calculation wasused to accessthe impactof adding semi-cokeon thefuelcostandsmelting cost of the blast furnace. The experimental results show that the average combustion rate of semi-coke in the blast furnace is 64.O3%,which is between bituminous coal and anthracite. Based on the calculation of on-site raw materials and fuel prices,it is obtained that when the price of semi-coke ranges from O. 80 and 1.21 Yuan/kg,adding semi-coke can reduce the fuel cost and smelting cost of blast furnaces. The findings of this study can provide theoretical guidance for iron and steel enterprises in selecting and injecting semi-coke.