Silicon carbide deoxidizer is a new type of composite deoxidizer with good performance, which can replace the expensive traditional deoxidizer ferrosilicon powder and alloy powder. It is suitable for deoxidization during smelting of ordinary steel, alloy steel and special steel. It has the characteristics of rapid deoxidization, early slag formation, strong reducing atmosphere, rich foam, etc. It can also improve the recovery rate of elements, and also has the role of carburization. It can replace some carburizers, reducing the cost of steelmaking. Using silicon carbide as a deoxidizer in steelmaking can stabilize the quality of molten steel, refine the grain size, and clean up harmful impurities in the molten steel. After use, the casting temperature of the molten steel is high, the quality of the casting billet is good, and the unit cost is low.