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.