The invention relates to a catalyst used in acrylonitrile manufacture. The method for preparing the catalyst comprises the processing steps of spray molding, pyrolysis, crystalling phase conversion, and activation roast, and is characterized in that template agent is added in a carrier at first, and the template agent is at least one of tetraethylammonium, tetrapropylammoniumsilicate, polyacrylamide and ethylsilicate; active components are added in the mixing material above mentioned, and the pH value is controlled between 1.5 and 2.5; the mixture is aged before spray molding, the aging temperature ranges from 60 to 120 DEG C, the operating pressure ranges from 0.01 to 0.8Mpa, and the aging time is 1 to 10 hours; the catalyst prepared according to the proposal contains a silicon dioxide carrier and a combination, the chemical formula of which is AaBbCcDdMgeNifBigFehMoiOx calculated on the basis of atomic ratio, wherein, the chemical formula can include Li, K, Cs, Rb, As, B, P, Se, Cu, Sn, Ga, Sr, Ba, Ce, Cr, V, Sb, La and Co. The catalyst has good activity, selectivity, anti-reducibility, and abrasion resistance and can be used in a reactor form a long time, and the service life can even reach more than three years.