A halogen-free flame retardant epoxy resin was synthesized, and glass fiber fabric reinforced epoxy resin prepreg was prepared by hot melt process. The properties of resin were characterized and analyzed by means of DSC and rheometer. The prepreg was prepared by epoxy resin and glass fiber fabric; composite material was prepared by autoclave forming process and the mechanical properties and flame retardant properties of the composite were analyzed. The results show that the flame retardant epoxy resin and prepreg have good processability; the composite have good mechanical properties and flame retardant properties; and all the properties of vertical/horizontal combustion, heat release rate, smoke density and smoke toxicity could meet the requirements of CCAR and other airworthiness standards.