Abstract: The two-phase flow in an anode channel was simulated by commercial software Fluent to study the effects of hydrophilic/hydrophobic properties on liquid distribution and gas behavior. The results showed that carbon-dioxide gas moved quickly on the hydrophobic surface. But hydrophobic channel side-wall had little benefits on the reactants transportiing to the gas diffusion layer (GDL). The reactants transportiing to GDL could be improved in an anode channel with hydrophilic channel side-wall and hydrophilic GDL surface，but it took more time for the gas to move out of the anode channel. An anode channel with hydrophilic channel side-wall and hydrophobic GDL surface avoided gas accumulation on the GDL surface，and facilitated the gas discharging and liquid transporting to GDL.