In　this　research,　aiming　to　deal　with　the　accelerated　corrosion　deterioration　of　steel　reinforcement　in　reinforced　concrete　in　harsh　environments,　a　highly　efficient　rust　inhibitor　(triethanolamine　(TEA)-triisopropanolamine　(TIPA))　(abbreviated　as　TT),　which　TEA　and　TIPA　compounded　in　a　ratio　4:6,　was　proposed.　The　synergistic　rust　inhibition　effect　of　TEA　and　TIPA　on　steel　in　the　simulated　concrete　pore　solution　(SCPS),　and　its　corrosion　inhibition　performance　were　investigated　by　electrochemical　impedance　spectroscopy　(EIS),　potentiodynamic　polarization　(PDP),　dry　and　wet　cycling,　and　scanning　electron　microscopy　(SEM)　measurements.　The　results　showed　that　TT　inhibitor　could　obviously　inhibit　the　corrosion　of　steel　in　the　SCPS　and　could　inhibit　both　cathode　and　anode.　The　electrochemical　corrosion　inhibition　performance　was　the　most　excellent　at　the　dosage　of　1.0　%,　and　the　maximum　corrosion　inhibition　efficiency　(eta　1)　eta　1　)　reached　95.39　%.　After　150　times　of　dry　and　wet　cycling,　the　percentage　of　the　corrosion　area　(S),　S　),　and　corrosion　inhibition　efficiency　(eta　2)　eta　2　)　with　1.0　%　TT　inhibitor　were　9.3　%　and　84.03　%,　respectively,　and　the　mass　loss　rate　(M)　M　)　decreased　by　68.4　%,　indicating　a　better　rust　inhibition　performance.　The　adsorption　of　the　TT　inhibitor　conformed　to　the　Langmuir　adsorption　isotherm　and　inhibited　the　corrosion　of　steel　by　forming　a　protective　film　on　steel　surface　through　physicochemical　adsorption.　This　study　is　of　great　significance　to　provide　new　perspectives　and　improvement　measures　to　build　up　the　deterioration　and　extend　the　service　life　of　reinforced　concrete　in　harsh　environments.