Abstract: The flame retardant core material used in aluminum plastic composite board can effectively improve the flame retardancy of the aluminum plastic composite board. At present, the flame-retardant core material is more and more widely used in aluminum plastic composite board. The classification system of the combustion performance of the aluminum-plastic composite plate was introduced, the methods to improve the flame retardancy of the core material of the aluminum plastic composite plate were analyzed. The common types of flame retardant core materials of the aluminum plastic composite board were reviewed, and the research prospect of flame retardant core material in the aluminum plastic composite board was put forward.