CeO2　grafted　polydopamine-wrapped　graphene　(G@PDA-CeO2)　was　prepared　by　the　layer-by-layer　assembly　to　enhance　the　anticorrosive　property　of　the　epoxy　resin.　Electrochemical　measurement　results　show　that　embedding　0.5　wt%　of　G@PDA-CeO2　in　the　epoxy　resin　can　effectively　protect　metal　substrates　for　up　to　56　days.　After　being　immersed　in　a　3.5%　NaCl　solution　for　56　days,　its　impedance　modulus　at　0.01　Hz　is　still　as　high　as　1.360　×　108　Ω　cm2,　which　is　2　orders　of　magnitude　higher　than　pure　epoxy　resin　coating.　In　addition,　the　scratch　immersion　test　results　show　that　the　composite　coating　embedded　with　0.5　wt%　G@PDA-CeO2　has　excellent　corrosion　inhibition.　Such　excellent　anticorrosive　property　is　attributed　to　the　synergistic　effect　of　graphene＇s　outstanding　barrier　effect,　polydopamine＇s　improved　dispersibility,　and　CeO2＇s　efficient　corrosion　inhibitory　effect　and　weak　hydrophilicity.　This　research　provides　a　promising　strategy　for　the　preparation　of　long-term　corrosion-resistant　graphene-based　polymer　anticorrosive　coatings.　©　2021