The invention relates to a rapid preparation method of a transition bi-metal silicide methanation catalyst with a high specific surface and belongs to the technical field of preparation of synthesis of metal silicide and methanation catalysts, and the prepared catalyst is used in a catalytic reaction for producing methane from coke oven gas. Existing catalysts have defects in high-temperature resistance, sintering resistance, sulfur resistance and other performance, SBA-15 is used as a silicon source, a nanoscale silicon/silicon oxide composite is prepared through magnesiothermic reduction and then uniformly mixed with a bi-metal solid solution prepared through complex precipitation, the mixture is subjected to high-temperature roasting in a tubular furnace, the porous transition bi-metal silicide catalyst with the high specific surface is obtained, and the catalyst has a good effect in synthesis gas reactions. The method is simple to operate, and easy to control, and transition metal is nickel and molybdenum.