Automobile exhaust's catalytic conversion device

The utility model discloses an automobile exhaust's catalytic conversion device, include the casing of being connected with automobile engine's gas vent and fix oxygen sensor on the casing, be provided with catalyst support in the casing, the last coating of catalyst support has the catalyst coating, catalyst support with be provided with between the casing and be used for fixing catalyst support's liner, the utility model provides an automobile exhaust's catalytic conversion device compact structure has reduced the part that uses to help reduction in production cost, in addition, owing to compressed the distance of catalytic conversion device apart from the gas vent of engine, make the catalytic conversion device heated more easily, thereby improved the catalytic conversion efficiency of tail gas.