Photo-thermal/electric-thermal dual-curing composite film for lightning protection repair, preparation method and application

The preparation method comprises the following steps: weighing 20-50 parts by mass of solid epoxy resin, 10-50 parts by mass of an aliphatic epoxy diluent, 1-6 parts by mass of a curing agent and 0-2 parts by mass of an accelerant, heating, and uniformly stirring to prepare mixed resin which is solid at room temperature and is heated into liquid; secondly, dispersing 2-10 parts of functional filler in water to prepare a functional filler dispersion liquid; adding the mixed resin into the functional filler dispersion liquid, stirring to obtain a Pickering emulsion, and cooling, draining and drying the emulsion to obtain the composite film which takes a three-dimensional conductive network as a framework and is formed by filling the mixed resin. The invention further discloses application of the composite film, the composite film is flatly laid on the damaged part of the wind turbine blade to be cured, and the curing mode is photo-thermal or electric heating curing; the curing mode of the epoxy adhesive film is