In　the　marine　environment,　most　of　the　marine　concrete　will　be　corroded　and　destroyed　before　reaching　the　designed　service　life,　resulting　in　serious　national　marine　engineering　safety　risks　and　marine　environment　pollution.　The　corrosion　of　steel　bar　caused　by　chloride　ions　is　the　main　reason　for　the　deterioration　of　the　structural　performance　of　marine　concrete.　Based　on　the　characteristic　of　polychlorinated　salts　in　marine　environment,　starting　from　the　process　of　chloride　ion　erosion　on　marine　concrete,　this　paper　reviews　and　summarizes　the　corrosion　path　and　mechanism　of　chloride　ions　from　the　process　of　chloride　ions　eroding　marine　concrete.　It　focuses　on　the　path　of　chloride　ions　entering　concrete　through　penetration,　diffusion　and　electrochemical　migration,　and　the　corrosion　mechanism　of　chloride　ions　destroying　passivation　film,　forming　corrosion　battery,　depolarization　and　conductivity.　On　this　basis,　aiming　at　the　latest　research　on　chloride　ions　corrosion　resistance　of　marine　concrete　at　home　and　abroad,　this　paper　introduces　the　mechanism　of　chloride　ions　solidification,　and　focuses　on　the　fundamental　measures　such　as　improving　the　compactness　of　marine　concrete,　reducing　cracks　in　marine　concrete　and　increasing　the　thickness　of　marine　concrete.　At　the　same　time,　it　summarizes　the　supplementary　measures　of　concrete　surface　protection,　steel　bar　protection　and　adding　rust　inhibitor,　crack　repairing　to　improve　the　chloride　ions　corrosion　resistance　of　marine　concrete.　Finally,　it　raises　that　there　is　a　big　gap　between　the　single　chloride　ions　corrosion　process　in　the　current　research　and　the　concrete　in　the　actual　seawater.　Low-carbon　and　environmentally　friendly　anti-chloride　ions　corrosion　concrete　materials　and　technologies　need　to　be　further　developed.　©　The　Author(s)　2023.