The invention discloses a preparation method of a carbon monoxide methanation catalyst without reductive activation, and belongs to the technical field of catalysis. The preparation method of the carbon monoxide methanation catalyst without reductive activation is characterized by comprising adding a mixed nitrate solution containing Al<3+> and Ni<2+> and an alkaline precipitator into water by a parallel flow method and maintaining the pH value of the obtained solution in the arrange of 7-8; performing aging, washing, filtering and drying and performing calcining in an inert atmosphere after the neutralization process; dispersing the obtained products and an aliphatic hydroxy acid in an easily volatile organic solvent uniformly; performing drying and performing calcining in an oxygen-free condition to remove the organic solvent; and performing tableting and moulding on the residual solid.