In　recent　years,　metal　corrosion　causes　serious　threats　to　the　economy　of　the　world　and　the　living　environment.　Hence,　it　is　very　important　to　seek　non-toxic　and　environmentally　friendly　materials　with　metal　anti-corrosion　properties　for　the　sustainable　development　of　society.　The　barrier　properties　of　graphene　oxide　(GO)　and　the　special　electrochemical　property　of　polyaniline　(PANI)　can　significantly　improve　the　corrosion　resistance　of　metals.　Herein,　we　developed　an　in-situ　polymerization　method　to　prepare　graphene　oxide/polyaniline　(GO/PANI)　nanocomposites　with　unique　anti-corrosion　properties.　The　obtained　GO/PANI　nanocomposites　were　characterized　by　Fourier　transform　infrared　spectroscopy,　X-ray　diffraction,　thermalgravimetric　analysis,　UV-vis　spectroscopy　and　scanning　electron　microscopy.　The　as-prepared　composite　materials　were　uniformly　dispersed　in　epoxy　resin　to　prepare　anticorrosive　coatings　and　coated　on　the　surface　of　steel.　The　anti-corrosion　performance　of　the　coatings　was　measured　by　electrochemical　impedance　spectroscopy　(EIS)　and　potentiodynamic　polarization　technique.　The　EIS　results　showed　that　the　total　impedance　of　epoxy/GO/PANI　coatings　is　greater　than　epoxy/PANII　coatings,　and　the　impedance　module　value　can　reach　8.67　x　10(8)　omega　center　dot　cm(2).　In　general,　it　is　concluded　that　the　anti-corrosion　performance　of　GO/PANI　coating　is　significantly　higher　than　PANI　coating　and　pure　GO　coating.