NOVELTY - Plasma modified full polyester solar battery back film comprises a polyethylene terephthalate (PET) base material (3), provided with a first high weather resistant PET layer (1) at one side and a second high weather resistant PET layer (5) on the other side. The second high weather resistant PET layer is arranged on the outer surface of the grafting layer (6). The PET base material and the first high weather resistant PET layer are connected by a first adhesive layer (2). The PET base material and the second high weather resistant PET layer are connected by a second adhesive layer.    USE - Used as a plasma modified full polyester solar battery back film.    ADVANTAGE - The film is economical, and has excellent hydrophilic performance with high adhesion properties.    DETAILED DESCRIPTION - AN INDEPENDENT CLAIM is also included for producing the nano-plasma modified fluorinated high weather-resistant solar battery back film comprising: (i) processing first high weather resistant PET at one side of the plasma processor for 0.1-2 seconds, and forming a grafting layer on one side of the first high weather resistant PET, where the working gas is nitrogen and oxygen in a volume ratio of (0.1-2):1 with a concentration of 99-99.99 and the discharge frequency is 50-5000 Hz; (ii) compositing one side of the first high weather resistant PET with one side of the PET base material through a bonding material to obtain a first high weather resistant PET layer, where the compositing pressure is 3-10 kgf, and conducting primary solidification at 40-60 degrees C for 1-3 days; and (iii) compositing the other side of the PET base material and the second high weather resistance PET by a bonding material to obtain the second high weather resistant PET layer, where the compositing pressure is 3-10 kgf and curing at 40-60 degrees C for 3-10 days.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the plasma modified full polyester solar battery back film.    First high weather resistant PET layer (1)    First adhesive layer (2)    PET base material (3)    Second high weather resistant PET layer (5)    Grafting layer (6)