NOVELTY - Hydrogenation catalyst comprises cobalt, nickel, aluminum, and oxygen where the mass ratio of cobalt and aluminum is 0-17, and nickel and aluminum is 0-19, according to mass percent of cobalt is 0-46%, nickel is 0-51%, aluminum is 2.69-34% , and oxygen is 3.93-54%, and the total content is 100 %.    USE - The hydrogenation catalyst is used in preparing alkane biological fuel (claimed).    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for (1) preparation of hydrogenation catalyst comprising (i) taking cobalt salt, nickel salt and aluminum salt in the ratio of 0-2.0 and 0-2, dissolving in deionized water, preparing into solution, adding dispersant, adding precipitating agent, under water bath environment, adjusting the pH to 8-10, stirring, ultrasonicating, allowing to stand, aging, filtering and washing the precipitate, taking the central filtered liquid, drying, grinding, sieving, baking, heating and dehydrating to obtain hydrogenation catalyst oxide, carrying out hydrogenation reduction of hydrogenation catalyst oxide, with hydrogenation catalyst, cobalt-nickel double metal compound oxide solid catalyst; and (2) Preparing alkane biological fuel comprising adding lipid and hydrogenation catalyst in a reaction kettle, stirring and reacting under heating in hydrogen atmosphere, filtering the reaction product by suction filtration, allowing to stand, delaminating, taking upper layer rough fuel, vacuum distilling to obtain alkane biological fuel, where the reaction temperature is 250-320 degrees C, the pressure of hydrogen is 20-80 bars, the catalyst mass percent of raw material is 0.5- 5%, hydrolyzing at stirring speed of 300-1000 rotations/minute, the lipid is from palm oil, waste oil, waste animal and plant lipid, Jatropha curcas fruit oil, lipid mico-algae, soybean oil, colza oil, cottonseed oil, fatty acid, and/or petroleum products obtained by chemical synthesis method to obtain the fatty acid, the lipid may be from a fatty acid hydrogenation deoxide to obtain the fat alcohol.