To　investigate　the　interfacial　bond　strength　of　Carbon　Fiber　Reinforced　Polymer　(CFRP)　and　concrete　structures　in　chlorine　salt　solution　with　wet-dry　cycles,　experiments　on　the　corrosion　degradation　performance　of　CFRP-concrete　specimens　with　wet-dry　cycles,　including　compressive　strength,　elastic　modulus　of　concrete,　and　bond　performance　was　conducted.　A　stable　single-shear　testing　device　was　designed　to　control　the　specimens　in　the　tests.　By　simulating　the　wet-dry　cycles　with　chlorine　salt　solution,　the　time-dependent　characteristics　including　the　mechanical　properties　of　the　concrete　substrate　and　the　effective　bond　length　were　studied.　The　interfacial　bond-slip　relationship　and　the　interfacial　fracture　energy　in　different　corrosion　duration　were　analyzed　on　the　basis　of　the　Popovics　equation.　Meanwhile,　the　degradation　mechanism　of　the　interfacial　bond　strength　of　the　CFRP-concrete　interface　was　revealed,　and　a　formula　for　the　time-dependent　bond　strength　was　proposed.　The　results　show　that　the　elastic　modulus　of　concrete　does　not　change　much　along　with　the　wet-dry　cycles,　while　the　compressive　strength　shows　a　trend　of　first　increasing　and　then　decreasing,　and　finally　decreasing　by　11.2%.　The　effective　length　decreased　from　120　mm　to　72　mm　in　120　days　and　the　performance　of　interfacial　fracture　energy　shows　a　significant　reduction.　This　indicates　that　the　mechanism　of　the　bond-slip　relationship　in　the　CFRP-concrete　interface　based　on　the　Popovics　equation　can　reveal　the　deterioration　mechanism　of　interfacial　bond　strength　under　the　corrosion　environment,　and　the　proposed　time-dependent　interface　bond　strength　model　is　effective　and　can　be　widely　used　in　calculating　the　interfacial　bond　strength　of　the　CFRP-concrete　under　wet-dry　cycles.　©　2022,　Editorial　Office　of　Journal　of　Building　Structures.　All　right　reserved.