NOVELTY - Hydrogenation methanation catalyst comprises carrier A, carrier B and an active component C. The carrier A is titanium zirconium composite carrier. The carrier B is titanium dioxide, The active component C comprises nickel oxide, where the nickel oxide is obtained by decomposing the synthesized basic nickel carbonate by heat, and the synthesized basic nickel carbonate is prepared by: in the presence of Triton (RTM: Nonionic surfactant) and polyethylene glycol, co-precipitating nickel nitrate solution and carbonate solution and aging.    USE - The catalyst is useful for hydrogenation methanation of high-concentration carbon monoxide and carbon dioxide, coke oven gas methanation or coal gas methanation (all claimed).    ADVANTAGE - The catalyst has good heat resistance ability due to strong interaction between nickel oxide and titanium dioxide, has large surface area or large pore volume and high heat resistance of the titanium zirconium composite carrier. The catalyst has: physio-chemical properties of 0.6-1.1 kg/l of bulk density, 120-200 m2/g of surface area, 0.2-0.5 ml/g of pore volume and 80% of pore diameter distribution between 80-120 Angstrom ; catalytic activities of 250 degrees C of starting temperature, 750 degrees C of heat resistance temperature, more than 98% of carbon monoxide and hydrogen, and more than 97% of methane selectivity.    DETAILED DESCRIPTION - Hydrogenation methanation catalyst, comprises carrier A, carrier B and an active component C. The carrier A is titanium zirconium composite carrier (10-40 parts, preferably 30-40 parts) where the molar ratio of titanium dioxide to zirconium oxide is (1:1)-(5:1), preferably 4:1. The carrier B is titanium dioxide (10-30 parts, preferably 15-26 parts). The active component C comprises nickel oxide (10-40 parts, preferably 15-25 parts), where the nickel oxide is obtained by decomposing the synthesized basic nickel carbonate by heat, and the synthesized basic nickel carbonate is prepared by: in the presence of Triton (RTM: Nonionic surfactant) and polyethylene glycol, co-precipitating nickel nitrate solution and carbonate solution and aging the precipitate for 2-4 hours to obtain synthesized basic nickel carbonate, where the temperature during coprecipitation and aging is controlled at 50-90 degrees C and the pH is 7-9, preferably, the adding amount of polyethylene glycol is 0.3-2.6 vol.% of that of carbonate solution, and the adding amount of Triton (RTM: Nonionic surfactant) is 0.03-0.2 vol.% of carbonate solution. An INDEPENDENT CLAIM is also included for preparing the hydrogenation methanation catalyst of high-concentration carbon monoxide and carbon dioxide, comprising: (i) dissolving metatitanic acid by heat after adding sulfuric acid to produce a titanium solution with titanium dioxide, and mixing the titanium solution with the zirconium oxychloride, dropwise adding aqueous ammonia with stirring, co-precipitating at room temperature of -90 degrees C and with a pH of 7-9, aging for 1-4 hours, washing the precipitate with deionized water to remove chloride ions and sulfate ions to obtain the precursor of titanium-zirconium composite carrier; (ii) preparing the synthesized basic nickel carbonate as mentioned; and (iii) weighing carrier A or a compound which can be decomposed into carrier A by heat, carrier B or a compound which can be decomposed into carrier B by heat, and active component C or a compound which can be decomposed into active component C by heat, mixing the weighed materials evenly, calcining them in a muffle furnace at 500-600 degrees C for 2-4 hours to obtain the catalyst, where the compound which can be decomposed into carrier A by heat is the precursor of titanium-zirconium composite carrier, the compound which can be decomposed into carrier B by heat comprises metatitanic acid which can be decomposed into titanium dioxide by heat, and the compound which can be decomposed into active component C by heat contains synthesized basic nickel carbonate which can be decomposed into nickel oxide by heat.