The　influence　of　the　plastic-steel　fiber　content　and　freezing-thawing　cycles　on　the　bond　behavior　between　rebars　and　concrete　was　studied　by　performing　center　pull-out　test　with　two　group(twenty　four　specimens).The　bond　stiffness　and　bond　toughness　were　defined　based　on　the　bond　stress-slip　curve.The　uneven　distribution　coefficient　of　bond　stress　was　defined　by　the　positional　relationship　between　the　bond　stress　and　anchorage.The　above　indictors　were　used　to　quantitatively　determine　the　variation　trend　of　concrete　bond　behavior　under　freezing　and　thawing　environment.The　results　showed　that　plastic-steel　fiber　reinforced　lightweight　aggregate　concrete　exhibited　a　patter　of　pull-out　failure,　while　plain　lightweight　aggregate　concrete(without　fiber)　exhibited　a　patter　of　splitting　failure.The　bond　stiffness　and　bond　toughness　of　plastic-steel　fiber　reinforced　lightweight　aggregate　concrete　were　higher　than　those　of　plain　lightweight　aggregate　concrete.With　the　increase　of　freezing-thawing　cycle,　both　bond　stiffness　and　bond　toughness　showed　a　decreasing　trend.The　bond　stiffness　of　plastic-steel　fiber　reinforced　lightweight　aggregate　concrete　in　the　early　freezing-thawing　period　was　higher　than　that　of　plain　lightweight　aggregate　concrete.However,　the　bond　stiffness　of　plastic-steel　fiber　reinforced　and　plain　lightweight　aggregate　concrete　were　almost　similar　in　the　late　freezing-thawing　period.The　relationship　between　bond　toughness(Au,　A80)　and　ultimate　bond　strength　of　plastic-steel　fiber　reinforced　lightweight　aggregate　concrete　was　basically　linear.The　bond　stress-anchorage　position　relationship　of　the　two　groups　showed　a　trend　of　first　increasing　and　then　decreasing.According　to　the　change　rule　of　coefficient　ζ,　the　load-end　was　the　main　force　extents　at　the　early　stage　of　freezing　and　thawing,　while　the　force　extents　migrated　to　the　free　end　at　the　late　stage.　©　2021,　The　Editorial　Board　of　Journal　of　Basic　Science　and　Engineering.　All　right　reserved.