Reaction-sintered silicon carbide rollers are characterized with excellent high-temperature bending strength, oxidation resistance, super wear resistance, free breaking in long-term use at a high temperature, free bending and deformation, and are applicable to high-temperature firing zone of roller kilns for daily ceramics, sanitary porcelain, building porcelain, glass and magnetic materials. The service life is more than 10 times that of aluminum oxide ceramic rollers.