Hot-melting adhesive functional film

The invention discloses a hot-melting adhesive functional film. The hot-melting adhesive functional film is formed by sequentially and fixedly connecting an olefin copolymer layer, a bonding layer, a substrate polyester layer and a weather-proof layer, wherein the olefin copolymer layer and the substrate polyester layer are prepared by means of molten coating, film casting or double-layer co-extrusion, and the weather-proof layer and the bonding layer are prepared by thermocuring after being subjected to wet coating. The olefin copolymer layer of the functional film has good bonding property for copper wires and battery pieces, the substrate polyester layer has excellent dimensional stability, and the weather-proof layer has good weather resistance; furthermore, the light transmission of the polymer film is improved by adjusting refractive indexes between all the layers and the thickness of all the layers. The functional film not only provides a fixing function for a battery provided with multiple main grids,