In　this　work,　the　coupling　effect　of　stress　and　stray　current　on　corrosion　of　X80　pipeline　steel　was　investigated　in　soil-simulating　solution　by　open　circuit　potential　(OCP)　and　corrosion　potential　test,　potentiodynamic　polarization　measurement　and　surface　characterisation　technique.　A　mathematical　relationship　between　corrosion　rate　and　yield　strength,　direct　current　(DC)　stray　current　density　was　obtained　through　multiple　linear　regression.　The　results　indicate　that,　the　corrosion　potential　of　X80　pipeline　steel　with　and　without　superimposed　DC　stray　current　all　shift　negatively,　and　the　corrosion　rate　increases　with　the　enhancement　of　tensile　stress　in　solution.　Moreover,　the　above　laws　become　increasingly　obvious　with　DC　stray　current　density　form　0.5　to　3.5　mA/cm(2).　Comparing　with　the　stress,　the　effect　of　stray　current　on　corrosion　rate　of　X80　pipeline　steel　is　more　significant　in　elastic　deformation.　Mutation　in　corrosion　potential　and　corrosion　rate　appeared　when　the　strain　reaches　plastic　deformation.　This　study　provides　important　recommendations　for　pipeline　safety　design　and　operation,　where　the　corrosion　enhancement　due　to　the　coupling　effect　of　stress　and　stray　current　should　be　considered.