The　effects　of　cold　deformation　and　annealing　on　the　intergranular　corrosion　property　of　5E06　aluminium　alloy　plates　were　investigated　by　intergranular　corrosion　property　tests　and　transmission　electron　microscope　(TEM).　The　results　show　that　the　intergranular　corrosion　property　of　5E06　aluminium　alloy　plates　has　close　relationship　with　the　distribution,　morphology　and　quantity　of　β　phase.　When　the　cold　deformation　is　under　40%,　β　phase　is　easy　to　precipitate　continuously　at　grain　boundaries　which　will　worsen　the　intergranular　corrosion　property.　When　the　cold　deformation　exceeds　55%,　β　phase　is　not　easy　to　achieve　succession　after　stabilizing　annealing　and　the　5E06　aluminum　alloy　plates　have　favorable　intergranular　corrosion　property.　Sensitization　tests　indicate　that　the　effect　of　stabilizing　at　120°C　is　not　desirable　for　5E06　aluminum　alloy　plates　at　cold　deformation　of　55%-80%,　whereas　the　aluminum　alloy　plates　annealed　at　220°C　can　obtain　homogeneous　subgrains　and　β　phase　distributes　discretely　at　grain　boundaries　and　subgrain　boundaries　which　can　reduce　the　degree　of　supersaturation　to　some　extent.　Therefore,　the　intergranular　corrosion　property　of　5E06　aluminum　alloy　plates　at　stabilizing　annealing　states　won＇t　degenerate　obviously　in　the　long-term　using　process.