In order to study the influence of snake-like flow field structure on fuel cell performance, a three-dimensional cathode model of snake-like flow field of proton exchange membrane fuel was established by using multi-physical field direct coupling analysis software COMSOL.The influence of single, double and triple serpentine flow fields on the pressure distribution in the cell flow field was analyzed, and the validity and reliability of the established model were verified.On the basis of the three-serpentine flow field structure, when the serpentine fuel cell corner is designed as a right-angle structure and a rounded corner structure, the fluid velocity inside the flow field and at the inflection point of different corner structures are analyzed.The results show that the pressure loss of the three-serpentine flow field is relatively small. The serpentine fuel cell with a rounded corner structure can improve the flow and diffusion of reaction gas, thus increasing the reaction rate.