Corrosion　inhibitor　have　a　significant　influence　on　corrosion　rate　of　marine　concrete.　T　In　this　paper,　linear　polarization　method　is　used　in　reinforced　concrete　that　under　marine　environment,　and　reinforced　concrete　is　mixed　with　corrosion　inhibitor.　The　results　show　that:　corrosion　inhibitor　has　little　influence　on　the　basic　mechanical　properties　of　reinforced　concrete,　and　it　can　effectively　improve　the　corrosion　resistance　ability　of　reinforced　concrete.　For　reinforced　concrete　of　the　same　corrosion　inhibitor　content,　with　the　decline　of　water-cement　ratio,　the　steel　corrosion　rate　descends;　in　a　certain　content　range,　with　the　increase　of　corrosion　inhibitor　content,　the　corrosion　rate　of　reinforced　concrete　decreases　evidently.