The invention provides a high-thermal conductivity insulating solar cell-packaging film. Acrylic ester-modified EVA (ethylene-vinyl acetute) superpolymer is adopted as a solar cell-packaging film, and is added with high-thermal conductivity powder and various auxiliaries, and thereby the high-thermal conductivity insulating packaging film for packaging a solar photoelectric-photothermal integrated system is prepared. A preparation method for the packaging film includes the following steps: according to a certain proportion, the materials are uniformly mixed, the mixture is poured into a double-screw extruder to be subjected to mixing, plastifying, extruding and cutting into granules, and the granules are then molded by compression. The high-thermal conductivity solar insulating packaging material prepared by the invention has excellent bonding property, high crosslinking density, high heat-resistant property, excellent insulativity and high aging resistance, and can withstand outdoor ultraviolet light, thermal oxidation and moisture corrosion for a long time, and the yellowing resistance of the high-thermal conductivity insulating packaging material is greatly enhanced in comparison with the yellowing resistance of like products.