The　conducting　film　based　on　chemical　vapor　deposition　(CVD)-graphene/poly(3,　4-ethylenedioxythiophene)-poly(styrenesulfonate)　(PEDOT-PSS)　hybrid　composites　was　prepared　by　using　liquid-phase　exfoliation　method.　The　microstructure　of　the　graphene/PEDOT-PSS　hybrid　composites　was　characterized　by　using　atomic　force　microscope　and　SEM.　The　conduction　mechanism　of　the　as-fabricated　graphene/PEDOT-PSS　film　was　studied　by　using　ultraviolet-visible　absorption　spectroscopy,　X-ray　photoelectronic　spectroscopy　and　FTIR.　The　graphene/PEDOT-PSS　film　shows　high　electrical　properties　with　a　sheet　resistance　of　approximate　8　Ω/□.　The　conjugation　effect　between　graphene　and　thiophene　in　PEDOT　main　chain　leads　to　a　change　of　electron　cloud　density,　which　enhances　the　carrier　delocalization　of　PEDOT　main　chain　and　results　in　the　conductivity　enhancement　of　the　PEDOT.　Furthermore,　the　conjugation　effect　leads　to　the　increase　of　carrier　density　of　graphene,　which　can　enhance　the　conductivity　of　graphene/PEDOT-PSS　composite.　©　2018,　Editorial　Office　of　Acta　Materiae　Compositae　Sinica.　All　right　reserved.