The heating element, with high purity green hexagonal silicon carbide as the main raw material, according to the material ratio processing of billet, by 2200℃ high temperature silicification and rejunction product sintering and made of rod and tube. The normal use temperature in the oxidizing atmosphere can reach 1400 ° C, and the life of the silicon carbon rod is shorter with the higher the use temperature, so after the temperature of the electric furnace exceeds 1400 ° C, the oxidation speed is accelerated and the life is shortened, and the use of the silicon carbon rod should be careful not to let the surface temperature of the silicon carbon rod be too high. It has the characteristics of high temperature resistance, chemical resistance, corrosion resistance, fast heating, long life, small deformation at high temperature, convenient installation and maintenance, and has good chemical stability. Now widely used in electronics, magnetic materials, powder metallurgy, ceramics, glass, semiconductor, analysis, scientific research and other high temperature fields, become tunnel kiln, roller kiln, glass kiln, vacuum furnace, Muffle furnace, smelting furnace and all kinds of heating equipment electric heating elements.