Thermoplastic photovoltaic module packaging adhesive film and preparation method thereof

The invention discloses a thermoplastic photovoltaic module packaging adhesive film and a preparation method thereof. The photovoltaic composite material comprises a gas barrier layer and bonding layers formed on the upper surface and the lower surface of the gas barrier layer, wherein the bonding layer is prepared from 100 parts by weight of first photovoltaic matrix resin, 0.1 to 1 part by weight of tackifier, 0.1 to 3 parts by weight of assistant cross-linking agent, 0 to 50 parts by weight of pigment and 0 to 3 parts by weight of processing aid; the first photovoltaic matrix resin is prepared from 5 to 50 parts by weight of ethylene-vinyl acetate resin, 15 to 95 parts by weight of modified polyolefin transparent resin and 0 to 35 parts by weight of polyolefin transparent resin; the thermoplastic photovoltaic module packaging adhesive film has a pre-crosslinking degree of 1%-50%. Because the adhesive film is free of a cross-linking agent, cross-linking in a screw rod in extrusion processing can be avoided,