NOVELTY - Methane catalyst prepared from synthesis gas, comprises (wt.%) iron oxide (1-20), cobalt oxide (1-30), nickel oxide (1-30), rare earth oxide (0-10), molybdenum oxide (0-10), and silicon carbide carrier (50-97).    USE - Methane catalyst.    ADVANTAGE - The methane catalyst uses silicon carbide material, which has stable chemical characteristic and good heat conduction performance as catalyst carrier. It has high catalytic activity, good selectivity of methane, fouling resistance, and long service life.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a preparation method of methane catalyst prepared from synthesis gas comprising:    (A) (when carrier is silicon carbide with high area ratio or biomass silicon carbide) preparing cobalt salt, nickel salt, and iron salt (1-20 mass%), rare earth metal salt (1-20 mass%), and molybdenum salt (1-20 mass%); soaking silicon carbide carrier at prepared iron, cobalt, and nickel salt solution under stirring condition, heating at 40-100 degrees C, dipping the dried sample into rare earth metal salt solution after volatilizing solvent, stirring and drying the solvent at 40-100 degrees C, and soaking in molybdenum salt solution again, or soaking silicon carbide carrier at the prepared iron, cobalt, and nickel salt solution and rare earth metal salt solution, stirring and heating at 40-100 degrees C, and finally soaking in molybdenum salt solution and preserving the temperature of the solution within 40-100 degrees C, where stirring time is 1-24 hours and active component is deposited on the surface of silicon carbide carrier after the solvent volatilized, or adjusting the pH of the solution by ammonia until the pH is more than 8 to deposit the active component on the surface of silicon carbide carrier; and drying the carrier at 80-150 degrees C and roasting at 400-700 degrees C to obtain the loaded methane catalyst; or    (B) (when carrier is silicon carbide foam ceramic material) preparing cobalt salt, nickel salt, and iron salt (1-20 mass%), rare earth metal salt (1-20 mass%), and molybdenum salt (1-20 mass%); soaking the blocky silicon carbide carrier at the prepared iron, cobalt, and/or nickel salt solution, dipping into rare earth metal salt solution after volatilizing solvent for 1-5 hours, drying and soaking in molybdenum salt solution again, stirring and drying the solvent at 40-100 degrees C, and roasting at 300-500 degrees C for 1-6 hours; and repeating the steps of soaking for 2-5 hours and roasting to obtain methane catalyst.