Hydrogen　crossover　has　an　important　effect　on　the　performance　and　durability　of　the　polymer　electrolyte　membrane　fuel　cell　(PEMFC).　Severe　hydrogen　crossover　can　accelerate　the　degradation　of　membrane　and　thus　increase　the　possibility　of　explosion.　In　this　study,　a　two-phase,　two-dimensional,　and　multiphysics　field　coupling　model　considering　hydrogen　crossover　in　the　membrane　for　PEMFC　is　developed.　The　model　describes　the　distributions　of　reactant　gases,　current　density,　water　content　in　membrane,　and　liquid　water　saturation　in　cathode　electrodes　of　PEMFC　with　intrinsic　hydrogen　permeability,　which　is　usually　neglected　in　most　PEMFC　models.　The　conversion　processes　of　water　between　gas　phase,　liquid　phase,　and　dissolved　water　in　PEMFC　are　simulated.　The　effects　of　changes　in　hydrogen　permeability　on　PEMFC　output　performance　and　distributions　of　reactant　gases　and　water　saturation　are　analyzed.　Results　showed　that　hydrogen　permeability　has　a　marked　effect　on　PEMFC　operating　under　low　current　density　conditions,　especially　on　the　open　circuit　voltage　(OCV)　with　the　increase　of　hydrogen　permeability.　On　the　contrary,　the　effect　of　hydrogen　permeability　on　PEMFC　at　high　current　density　is　negligible　within　the　variation　range　of　hydrogen　permeability　in　this　study.　The　nonlinear　relations　of　OCV　with　hydrogen　diffusion　rate　are　regressed.