Packaging adhesive film for double-glass photovoltaic module and preparation method of packaging adhesive film

The invention discloses a packaging adhesive film for a double-glass photovoltaic module and a preparation method of the packaging adhesive film. The packaging adhesive film comprises a cross-linking agent, a coupling agent, a composite supplement and POE (Polyolefin Elastomer) resin. The heat resistance of the packaging adhesive film can be effectively guaranteed, and deformation and yellowing of the packaging adhesive film can be effectively avoided; a polyurethane material and polycarbonate diol are prepared in the composite supplement material, so that the heat resistance of the packaging adhesive film can be effectively enhanced; the polylactic acid alloy material is prepared by compounding, blending and extruding the heat-resistant PBS serving as a modifier and the nucleating agent, the heat resistance of the material can be effectively improved, the nucleating agent and the PBS have a synergistic effect, a nucleating effect is achieved in polylactic acid, the crystallization property of the polylactic