The　sintered　shale　ceramsite　lightweight　aggregate　was　treated　by　the　atmospheric　pre-wetting　and　pressurized　pre-wetting.　The　bonding　properties　of　the　lightweight　aggregate　concrete　and　the　steel　bar　under　different　freezing　and　thaw　cycles　were　investigated.　The　mechanical　properties,　bond　strength,　load-slip　curve　and　bond　toughness　of　the　specimen　under　pre-wetting　were　analyzed.　The　experimental　results　show　that　the　mechanical　properties　and　ultimate　bonding　strength　of　the　preheated　wetting　specimen　were　lower　than　those　of　the　pre-wetting　specimen,　and　the　failure　modes　of　the　pre-wetting　specimen　were　all　fractured.　The　ultimate　bond　toughness　of　Au　decreases　with　the　increase　of　freeze-thaw　cycle,　and　the　residual　toughness　of　A80　and　A60　is　relatively　flat,　but　the　bond　toughness　of　the　pre-wetting　specimen　is　higher　than　that　of　pressurized　pre-wetting　specimen.Under　the　freezing　and　thawing　environment,　the　bond　toughness　degradation　model　and　the　degenerative　model　of　the　residual　strength　and　compressive　strength　of　the　steel　fiber　lightweight　aggregate　concrete　were　established.　The　calculated　values　of　the　model　were　in　good　agreement　with　the　experimental　values.　©　2018,　Editorial　Department　of　Journal　of　CAEE.　All　right　reserved.