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This paper explores the feasibility of the catalytic converter with an alloy honeycomb monolith carrier for light duty cross country vehicle. In accordance with special operating condition of light duty cross country vehicle, the purification function of the catalytic converter must be effective, and the vibration stength of the catalyst carrier must be strong enough as well, so that the carrier would not break to block up the exhaust passage when the vehicles are bumping along a rough road or when they are being cooled down rapidly in fording water pools. On the basis of dispersing pattern of the thermo-strain after the carrier is heated extremely, the form of feeding of carrier is improved significantly, so that if by any chance the catalyst is working overloaded, the carrier can still retain original honeycomb after it is sintered. It doesn't interfer with normal running of vehicles, because the flow resistance of exhaust gas is not increased.