NOVELTY - An ethylene vinyl-acetate copolymer rubber film comprises 82-94 wt.% ethylene vinyl-acetate resin containing vinyl acetate content of 24-28 wt.%, 5-15 wt.% polyolefin elastomer which is polymer of ethylene and octene, 0.1-0.5 wt.% ultraviolet aging resisting additive which is benzophenone or hindered amine compound, 0.3-1.5 wt.% liquid peroxide crosslinking agent having conductivity of less than 0.1 mu S/cm, and 0.1-1 wt.% liquid silane coupling agent having conductivity of less than 0.1 mu S/cm.    USE - Ethylene vinyl-acetate copolymer rubber film is used for packaging material of photovoltaic module.    ADVANTAGE - The ethylene vinyl-acetate copolymer rubber film has volume resistivity of 1x 1015 Omega .cm, and reduced generation of conductive ions.    DETAILED DESCRIPTION - An ethylene vinyl-acetate copolymer rubber film comprises 82-94 wt.% ethylene vinyl-acetate resin containing vinyl acetate content of 24-28 wt.%, 5-15 wt.% polyolefin elastomer which is polymer of ethylene and octene, 0.1-0.5 wt.% ultraviolet aging resisting additive which is benzophenone or hindered amine compound, 0.3-1.5 wt.% liquid peroxide crosslinking agent having conductivity of less than 0.1 mu S/cm, and 0.1-1 wt.% liquid silane coupling agent having conductivity of less than 0.1 mu S/cm. The ethylene vinyl-acetate resin and polyolefin elastomer have melt flow rate of 20-45 g/10 minutes and 20-45 g/10 minutes, respectively. The polyolefin elastomer and ultraviolet aging resisting additive have melting point of 80-90 degrees C and less than 90 degrees C, respectively. An INDEPENDENT CLAIM is included for preparation of ethylene vinyl-acetate copolymer rubber film, which involves mixing polyolefin elastomer and ethylene vinyl-acetate resin in ratio of 1:0.5-1.5, then adding solid ultraviolet aging resisting additive, mixing, pelleting, mixing obtained pellet with other raw materials to prepare mixed material, extruding the mixed material through extruder into film, cooling, forming and rolling.