Abstract: For fiber-reinforced resin matrix composites, factors such as humidity and temperature during service will seriously affect the mechanical properties and service life of the composites. The research status of the damp-heat aging behavior of fiber reinforced resin matrix composites at home and abroad in recent years is expounded from following three aspects: the damp-heat aging mechanism, the changing law of mechanical properties, and the aging life prediction. Finally, the problems existing in the research on the damp-heat aging behavior of fiber reinforced resin matrix composites are pointed out, such as the lack of in-depth mechanism research, the lack of systematic research, and the less research on the life prediction of composite systems commonly used in aviation. Therefore, the main direction of research on the wet-heat aging behavior of composite materials is proposed.