The incorporation of baffle structures within the flow field of proton exchange membrane fuel cell bipolar plates plays a crucial role in enhancing mass transfer efficiency and increasing power density. To further optimize the overall performance of PEMFC systems, this study proposes a novel flow field baffle structure inspired by biomimetic airfoil design. The airfoil-shaped baffles were systematically designed and implemented in large-area PEMFC bipolar plates. Comparative analyses were conducted against conventional straight, triangular, and trapezoidal baffle configurations. The results demonstrate that the maximum power density of the proposed flow field is improved by 7.32%, 3.69%, and 5.22%, respectively. This work provides a strong foundation for structural optimization of advanced flow fields in large-area fuel cells and shows promising potential for practical engineering applications.