Si3N4 Bonded SiC ceramic refractory materials based on Si3N4 and SiC as mainly raw materials, through extruding or casting shaped, drying, and nitriding process, then finished. Which is new kind of refractory materials widely used under 1400 degree, with better thermal stability and better thermal shock property than common refractory and recrystalled SiC, also with oxidation resistance, alkali and acid and wear resistance, and high bending strength and good corrosion resistance and good crushing resistance, not easy to be polluted by melting of Al, Pb, and Zn, and Cu. Mainly products as tubular products, girder products, crucible, nuzzle and air cooled rollers and all kinds of irregular parts.