Process for treatment of a fibre-plastic composite of a rotor blade, comprising the following steps, wherein when performing the steps the rotor blade comprising the fibre-plastic composite is fitted to a wind power plant, - providing the fibre-plastic composite to be treated on the rotor blade, - preparing a local treatment region of the fibre-plastic composite, - providing a fibre-matrix composite comprising a UV-curable matrix material and a fibre material, - applying the fibre-matrix composite to the local treatment region of the fibre-plastic composite and - curing the matrix material by means of UV radiation, wherein - the fibre material is provided in a layup composite on a carrier film attached to the bottom surface of the fibre-matrix composite, wherein - during application of the fibre-matrix composite onto the local treatment region the carrier film is removed, - after introduction of the matrix material into the fibre material the fibre-matrix composite is provided with a UV protection applied to the top surface of the fibre-matrix composite and the UV protection is removed before the curing operation of the matrix material and - the curing of the matrix material is effected by means of UV radiation, wherein a UV lamp comprising a UV light source in a housing (32, 33) is used for curing the UV-curable matrix material on the rotor blade, characterized in that - the carrier film is applied in a double layer and - during removal is partially removed from the fibre-matrix composite and the fibre-matrix composite with its newly exposed side is applied and fixed onto the local treatment region of the fibre-plastic composite and subsequently the remaining carrier film is peeled off and the fibre-matrix composite is gradually pressed onto the local treatment region and in that - the housing is placed onto the local treatment region on the rotor blade in a lightfast manner, wherein the housing comprises a formfitting edge and is provided with a reflector layer. - providing the fibre-plastic composite to be treated on the rotor blade, - preparing a local treatment region of the fibre-plastic composite, - providing a fibre-matrix composite comprising a UV-curable matrix material and a fibre material, - applying the fibre-matrix composite to the local treatment region of the fibre-plastic composite and - curing the matrix material by means of UV radiation, wherein - the fibre material is provided in a layup composite on a carrier film attached to the bottom surface of the fibre-matrix composite, wherein - during application of the fibre-matrix composite onto the local treatment region the carrier film is removed, - after introduction of the matrix material into the fibre material the fibre-matrix composite is provided with a UV protection applied to the top surface of the fibre-matrix composite and the UV protection is removed before the curing operation of the matrix material and - the curing of the matrix material is effected by means of UV radiation, wherein a UV lamp comprising a UV light source in a housing (32, 33) is used for curing the UV-curable matrix material on the rotor blade, characterized in that - the carrier film is applied in a double layer and - during removal is partially removed from the fibre-matrix composite and the fibre-matrix composite with its newly exposed side is applied and fixed onto the local treatment region of the fibre-plastic composite and subsequently the remaining carrier film is peeled off and the fibre-matrix composite is gradually pressed onto the local treatment region and in that - the housing is placed onto the local treatment region on the rotor blade in a lightfast manner, wherein the housing comprises a formfitting edge and is provided with a reflector layer.