Abstract: Supercritical carbon dioxide (S-CO₂) Brayton cycle is considered to be a promising power generation system because of its high efficiency, simple layout, and compact configuration, which can be applied to thermal power generation, nuclear power generation, solar thermal power generation and other fields. Since some end equipment in the system is exposed to the high temperature and high pressure S-CO₂ environment for a long time, the high temperature corrosion resistance of these equipment is one of the research focuses. The research state of arts of corrosion behavior of candidate materials for high-temperature components in the system (austenitic steels, martensitic steels and nickel-based superalloy) in recent years is reviewed. The effects of internal microstructure, metal element content and external environment (temperature, pressure, impurities, etc.) on the corrosion behavior of the alloys are analyzed, including the two aspects of oxidation and carburizing corrosion, and the deficiencies of the current research on corrosion behavior of Alloys in S-CO₂ Brayton cycle and the research perspectives are put forward.