NOVELTY - Methanation-bimetallic catalysts preparation involves selecting solid sodium aluminate, solid nickel nitrate, cobalt nitrate solid, lanthanum nitrate solid, deionized water liquid and nitrogen gas. Nitrate aqueous solution is prepared by adding 15.57 g of nickel nitrate, 3.11 g of cobalt nitrate, 1.86 g of lanthanum nitrate and 200 ml of deionized water in beaker. Sodium aluminate aqueous solution is prepared by adding 7.24 g of sodium aluminate and 50 ml of deionized water in beaker.    USE - Method for preparing methanation-bimetallic catalysts used in carbon monoxide and carbon dioxide hydrogenation for produce and synthesize natural gas (claimed).    ADVANTAGE - The method is simple and short, which provides heat-resistance methanation-bimetallic catalysts having has good stability, anti-combination performance and good capability at 500-700 degrees C.    DETAILED DESCRIPTION - Methanation-bimetallic catalysts preparation involves selecting solid sodium aluminate, solid nickel nitrate, cobalt nitrate solid, lanthanum nitrate solid, deionized water liquid and nitrogen gas. Nitrate aqueous solution is prepared by adding 15.57 g of nickel nitrate, 3.11 g of cobalt nitrate, 1.86 g of lanthanum nitrate and 200 ml of deionized water in beaker. Sodium aluminate aqueous solution is prepared by adding 7.24 g of sodium aluminate and 50 ml of deionized water in beaker. The prepared aqueous solutions are mixed slowly under stirring for 30 min to form precipitate including aluminum hydroxide, nickel hydroxide, cobalt hydroxide and lanthanum hydroxide. The mixed solution is put in Buchner funnel of filter flask for leaching by using organic membrane, where filter cake is obtained. The filter cake is washing with deionized water and then washed with 100 ml of deionized water for 15 minutes with stirring for getting filter cake of product. The filter cake is put in quartz product boat for vacuum drying at 120 degrees C for forming solid phase mixture, which is heated at high-temperature for resolving and roasting in nitrogen atmosphere. The obtained quartz product is provided in high temperature section of tubular high temperature furnace (1) for receiving heat-resistance bimetallic methanation catalyst.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a high temperature furnace for prepared catalyst.    High temperature furnace (1)    Furnace base (2)    Display screen (3)    Indicator light (4)    Thermometer (5)