Layered double hydroxides (LDHs) has simple synthesis process,flexible structure,economy,environmental protection and anion exchange,which strengthen its application range in the field of anti?corrosion coatings.The target properties of LDHs can be achieved by a combination of one or more processes,or chemically modified by surface modification and internal anion replacement,enhancing the applicability of LDHs to meet the needs of different fields of application.This paper mainly focuses on the synthesis method of LDHs,the mechanism of corrosion protection,the practical application of LDHs corrosion protection,and its limitations and prospects.It analyzes the advantages and disadvantages of various synthesis methods,and provides suggestions for future research on the application of LDHs in the field of corrosion protection.