The process of priparing an industring an industrial catalyst is following: A five valence vanadium compound is reduced into a low valent compound in poresence of a reducing material and a solvent. A solution of the vanadium compound mixes with ammonium salts of sylfuric or sulfur-oxygen-cotg acid, barium sulfate, tifanic acid and clay minemal to prepare a clayey product. The clayey praduct is formed into honey-comb and calained to produce a honey-comb catalyst. The catalyst has good mouldabieity,wear resistance and high NOx reduction activity at high temp. It can keep the SO2 oxidation activity at lkow level and reduce the ammonium concentration of exhaust gases to low lovel after denitration (if it is used as reduction material).