Abstract: A metal monolith reactor with complicated structure，used in coupled methane steam reforming-combustion,was investigated by using a heterogeneous model based on the whole reactor in this work.Preliminary results showed that the application was considerably attractive, and the significant effects on the reactor performance of the operating parameters,such as inlet gas velocity ratio of reforming side and combustion side, inlet gas temperature and volumetric flux ratio of combustion side and reforming side were presented.