To　investigate　the　effect　of　chloride　wet-dry　exposure　on　the　bond　behavior　of　CFRP-concrete　with　surface　groove,　firstly,　four　groups　of　single-lap　tensile　specimens　with　different　groove　width-to-depth　ratios　were　designed　and　conducted.　After　the　four　groups　of　specimens　were　subjected　to　accelerated　corrosion,　failure　modes　and　bond　behavior　were　investigated.　Secondly,　based　on　two　categories　of　failure　modes,　models　were　proposed　to　calculate　the　bond　strength　for　fracture　failure　(model　I)　and　debonding　failure　(model　II)　of　the　specimens,　respectively.　Finally,　a　bond　design　method　has　been　proposed　for　CFRP-concrete　with　surface　groove　that　was　specifically　developed　for　coastal　environments.　The　results　show　that　the　failure　mode　of　the　surface　groove　method　changes　from　the　CFRP　fracture　without　erosion　to　the　CFRP　sheet　mixed　failure　and　debonding　failure.　The　bond　strength　of　grooving　method　decreases　along　with　the　wet-dry　cycles.　The　width-to-depth　ratio　is　positively　related　to　the　average　bond　strength　and　there　is　an　optimum　value.　Compared　with　the　experimental　values,　the　values　of　calculation　model　I　are　slightly　higher,　and　the　values　predicted　by　calculation　model　II　are　within　acceptable　limits.　These　indicate　that　the　grooving　method　has　better　bond　behavior　under　chloride　salt　solution　wet-dry　cycles,　and　the　proposed　design　method　is　applicable　to　guiding　the　bond　design　of　the　interface　in　coastal　environments.　©　2023