A series of epoxy resin matrix for shape memory composites were prepared by introducing an epoxy containing flexible chains into a aliphatic amine cured bi-phenol a type epoxy resin. The shape memory properties, processing properties and mechanical properties of the resin were studied. Both the shape retention rate and the shape recovery rate of the resin are above 98%. Rheological tests show that the resin is suitable for liquid composite molding. The tensile strength and flexural strength of a cured shape memory resin are comparable with commercial epoxy resins for structural use. The impact strength of the cured resins are all above 89 kJ/ m2 at room temperature and above 30 kJ/ m2 at -80℃.