The performance and stability of proton exchange membrane fuel cells are mainly dependent on mass transports in the gas diffusion layer (GDL). The mass transports in dual‐region including the regions of under‐channel and under‐rib are one of the factors that cause mass uneven distribution. Therefore, the wave structure and the auxiliary flow channel are introduced to enhance these mass transports. Auxiliary conventional parallel flow field (ACPFF), wave flow field (WFF), and auxiliary WFF (AWFF) are transferred into ANSYS MESHING for meshing, then imported into Fuel Cell and Electrolysis module on FLUENT for the solution. This comprehensive AWFF has important influences on mass even distribution and performance. The results reveal that dual‐region forced convections can be made by the periodic waved structure and the auxiliary flow channel. More reactants are forced to appear in GDL of under‐channel and under‐rib. Based on the simulation results, the distributions of oxygen, water, temperature are more even in AWFF. Specifically, the cell performance at high current density is improved obviously. Compared to CPFF, the max power density is increased by more than 4% in this novel flow field (AWFF), which will provide a new trial for the design of a comprehensive flow field.