Iso-butane dehydrogenation catalyst and preparation method thereof

An iso-butane dehydrogenation catalyst and a preparation method thereof relate to catalytic agents and preparation methods of the catalytic agents in chemical reactions. The catalyst comprises, by weight, 1-30% of vanadic oxide, 0.2-5% of alkali metal oxide, 0.1-10% of Ce containing rare earth elements or La oxide and 55-98.7% of nanometer Al2O3. The preparation method is first preparing an Al2O3 carrier, then mixing the carrier with vandic salt solution, alkali metal solution, the Ce containing the rare earth elements or La salt solution, and then stewing and filtering to obtain a catalyst sample, roasting the catalyst sample for a certain time at certain temperature, and finally preparing the iso-butane dehydrogenation catalyst. The prepared iso-butane dehydrogenation catalyst improves conversion rate of iso-butane and achieves high olefin selectivity on the bases of the vanadic system catalyst at present.