The durability problem caused by environmental erosion factors is an important reason that restricts the long-term service of reinforced concrete structures. Among them, the corrosion of steel bar caused by chloride erosion is one of the main factors causing the durability problem. The addition of anti-corrosion additives can improve the rust resistance by promoting film formation on the surface of steel bar and improving the properties of concrete (pore structure, hydration process, Friedel’s salt generation), which has gradually become a research hotspot in recent years. In this paper, the anti-corrosion additives were divided into four categories: traditional corrosion inhibitor, green plant extract corrosion inhibitor, nano materials and mineral admixtures. The research on anti-corrosion additives was reviewed from the aspects of material development, action mechanism and influence factors of corrosion inhibition. Finally, the shortcomings in the research of anti-corrosion additives were analyzed, and the suggestions for future research were put forward, in order to provide a reference for the prevention and control of steel bar corrosion in concrete.