To　reveal　the　changes　in　the　mechanical　properties　of　high-strength　bolted　connections　with　different　hole　types　after　corrosion,　four　groups　of　high-strength　bolted　connection　specimens　with　steel　plates　assembled　by　high-strength　bolts　were　subjected　to　neutral　salt　spray　accelerated　corrosion　tests　followed　by　shear　tests.　Based　on　the　test　results,　the　influence　of　corrosion　duration　on　the　slip　coefficient,　bolt　pre-tension,　initial　slip　load　and　ultimate　bearing　capacity　of　high-strength　bolted　connections　with　different　hole　types　are　discussed,　followed　by　the　presentation　of　simplified　methods　to　determine　the　slip　coefficient　and　bolt　pre-tension　with　corrosion　duration　taken　into　account.　It　is　found　that　one-day　acceleration　corrosion　in　the　salt　spray　chamber　of　this　paper　can　be　roughly　regarded　as　one-year　exposure　in　the　natural　environment　of　Jiaodong　Peninsula　of　China,　especially　for　the　long-term　corrosion.　Test　results　show　that　the　corrosion　has　a　more　pronounced　influence　on　the　slip　coefficient　of　high-strength　bolted　connections　with　enlarged　bolt　holes,　while　the　pre-tension　of　the　high-strength　bolt　is　more　sensitive　to　corrosion　when　standard　hole　is　used.　It　is　also　observed　that　the　initial　slip　load　of　high-strength　bolted　connections　are　significantly　affected　by　corrosion　while　the　corrosion　hardly　changes　the　ultimate　bearing　capacity　regardless　of　bolt　hole　type.　It　is　proved　that　the　proposed　simplified　methods　to　determine　the　amplification　factor　of　slip　coefficient　and　bolt　pre-tension　can　be　used　to　evaluate　the　initial　slip　load　of　high-strength　bolted　connections　in　corrosive　environments　conservatively.　©　2024　Institution　of　Structural　Engineers