The invention discloses a solar battery encapsulation adhesive film which comprises the following raw materials in parts by weight: 100 parts of ethylene-vinyl acetate polymer, 0.1-5 parts of organic peroxide, 0.05-10 parts of ultraviolet absorber, 0.05-5 parts of light stabilizer, 0.01-10 parts of antioxidant and 0.01-10 parts of carbon free radical scavenger, wherein the content of vinyl acetate polymer in the ethylene-vinyl acetate polymer is 25-35%; and the carbon free radical scavenger is mixture of one or more than two of benzofuranone, hydroxylamine, tertiary amine, bisphenolmonoacryate. In the invention, harmful alkyl free radicals (R.) generated by the adhesive film in thin oxygen or anaerobic state can be scavenged effectively, so that the properties of heat and humidity resisting, ultraviolet ray resisting, high/low temperature resisting, humidity-freeze resisting the like of the adhesive film are improved, the ageing and xanthochromia indexes are effectively reduced, higher light transmittance of the adhesive film is ensured, and the high efficiency of photoelectric conversion efficiency of solar batteries is ensured.