Abstract: The effect s of non-woven nanofibrous membranes as interlaminar interfaces on the mechanical performance of laminated composites were investigated. The nanofibers were prepared by elect rospinning of Epoxy 609( E-03) . Morphology and geomet ry of the nanofibers were analyzed by SEM and TEM , and the mechanical behaviorof the non2wovens was understood through tensile testing. The non-woven fabrics were incorporated into the interlaminar interfaces of lamina plies before curing. The mechanical properties of the cured panels were measured usingthree2point flexure and short-beam test s. The result s show that the mechanical performance of the composite laminates only has a little variation when a proper thickness of nanofiber nonwovens was used. Thus , a new type offunctional composite can be manufactured by this method.