In order to promote the application of UV-curing technology, the mechanical properties and the microstructure of the UV-curing epoxy composite are studied. On this basis, the UV-curing epoxy composite is used to repair the pre-damaged laminated beams for studying its repairing performance. The results reveal that, the mechanical properties of the UV-curing epoxy composite are favorable, compared with the thermal curing composite, and the bonding between resin matrix and fiber is good. The UV-curing epoxy composite patches significantly increase the tensile strength of the damaged laminated beams, and the strength of the repaired samples can reach 84.1% of the standard samples and is 1.21 times the strength of the unrepaired samples. Fiber reinforced UV-curing resin is a fast and effective method for repairing damaged composite laminates