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In this paper,a specially designed palladium membrane tube structure is prepared and used for the steam reforming reaction of methanol.This specially designed palladium membrane structure has a long tube electroplated with nickel or palladium at the upstream-end of membrane tube.This nickel or palladium plated metal surface serves as a bridge for the surface diffusion/spillover of the nascent hydrogen atoms over a 100 to 200mm distance directly from the SRR catalyst bed to the membrane surface for permeation out of the system.As a result,the conversion level of steam reforming reaction is increased.This extension tube allows the membrane and the catalyst section to operate independently at their optimized temperatures in a single reaction chamber while preserving high membrane efficiency; thus the use of this new membrane structure makes design of a membrane reactor more flexible to maximize mutual efficiency of catalyst and the membrane.