The flow channel structure of a proton-exchange membrane fuel cell (PEMFC) has an important influence on the reaction gas flow, heat exchange, and electrochemical reactions.In order to address issues such as uneven distribution of reaction gases, liquid water management and output performance in common flow channels, our team designed three types of lattice flow fields.A three-dimensional proton exchange membrane fuel cell geometric model of traditional parallel flow field and lattice flow field was established, and the output performance, oxygen transport resistance, oxygen molar concentration uniformity coefficient, oxygen distribution and liquid water saturation were compared.The results show that compared with the traditional parallel flow field, the output performance of the three lattice flow fields is higher than that of the traditional parallel flow field, and the peak power density increases by 24.74%. The oxygen transport resistance of the lattice flow field is significantly smaller than that of the traditional parallel flow field. The molar concentration uniformity coefficient is significantly larger than that of the traditional parallel flow field.Moreover, the lattice flow field can significantly improve the uniformity of oxygen distribution and liquid water management inside the battery, and is expected to provide new ideas for fuel cell flow channel structure innovation.