The catalyst in regular structure includes carrier in regular structure and active component coating distributed in the inner surface and/or outer surface of the carrier, with the thickness of the active component coating being in gradient distribution along pore canal axis of the carrier. Using the catalyst in regular structure can reduce the olefin content in FCC gasoline effectively from 43.6 wt% to 17.2 wt%, and convert 50.2 % of the converted olefin into propylene and ethylene. When the catalyst is used as the automobile tail gas catalyst, it can lower the ignition temperature of the tail gas by 30deg.c and raise the tail gas purifying rate up to 95 %.