Proton　exchange　membrane　fuel　cells　(PEMFC)　have　the　advantages　of　being　green,　sustainable　and　having　high　power,　which　is　one　of　the　important　means　of　solving　the　problem　of　environment　and　energy.　As　the　core　part　of　PEMFC,　the　membrane　electrode　assembly　(MEA)　is　an　important　place　for　multiphase　material　transfer　and　electrochemical　reaction　such　as　electron,　proton,　reaction　gas　and　product　water.　Design　and　preparation　of　MEA　with　high　activity　and　high　durability　is　very　important　to　improve　the　performance　of　PEMFC　and　reduce　its　manufacturing　cost.　The　methods　to　improving　the　performance　of　MEA　were　summarized　in　this　paper　from　three　aspects:　the　improvement　of　intrinsic　activity　of　catalyst,　the　structural　design　of　catalyst　layer,　and　the　structural　design　of　gas　diffusion　layer/catalyst　layer/proton　exchange　membrane　interface　(GDL/CL/PEM),　and　its　future　research　and　development　was　reviewed　and　prospected.　©　2022,　Editorial　Department　of　Journal　of　Beijing　University　of　Technology.　All　right　reserved.