To obtain the damage assessment of opt ieal fiber intelligent composite material and structure,a novel sensor which is made of multimode optical fiber twisting nilon band (or steel strand) is present ed.This sensor array that imbeded within the composite can be used to detect man y state parameters such as load,strain of material and structure.OTDR technology is applied to process real-time parallel and distributing sensing signals.The experimental results on stractural member of composite material show that this m ethod is practical,reliable,and has broad prospects for intelligent composite ma terial and structure. -