Abstract: A novel bionic leaf vein reaction channel structure was constructed, and further investigated the effects of leaf vein bending amplitude and branching angle on the performance of fuel cell. Results show that the bionic leaf vein reaction channel can significantly enhance the performance of fuel cell, and increasing the bending amplitude substantially improves the reaction performance and electrical output performance of the fuel cell. The enhancement of the branching angle is dependent on the bending amplitude, i.e. slightly increasing the bending angle can improve performance, but increasing it significantly produces an inhibitory effect.