NOVELTY - Polymer packaging material comprises e.g. a polymer resin, a grafting initiator, an organic silicon grating monomer, a peroxide crosslinking agent, a phenol or phosphite ester antioxidant, a hindered amine light stabilizer and a tackifier, where the polymer resin is ethylene homopolymer, alpha-olefin, copolymer of ethylene or ethylene-polar monomer. The alpha-olefin is 1-pentene, 1-hexene, 1-octene or 4-methyl-1-hexene. The grafting initiator is tert-Amyl peroxy neodecanoate or di-n-butyl peroxydicarbonate. The organic silicon grating monomer is vinyltrimethoxysilane or vinyltriethoxysilane.    USE - The polymer packaging material is useful for packaging solar cell.    ADVANTAGE - The polymer packaging material has 4-6 times reduced rate of water vapor permeation after being performed with humid heat aging test for 2000 hours when compared to the current packaging rubber film in the market, and the peel strength of the polymer packaging material with the glass is not reduced for more than 50%, thus it has excellent application prospects.    DETAILED DESCRIPTION - Polymer packaging material comprises (in wt.%): a polymer resin (100), grafting initiator (0.05-0.5), an organic silicon grating monomer (0.5-5), a peroxide crosslinking agent (0.1-10), a phenol or phosphite ester antioxidant (0.05-5), a hindered amine light stabilizer (0.01-5) and a tackifier (0.01-5), where the polymer resin is ethylene homopolymer, polyvinyl alcohol, polyvinyl butyral, or copolymer of ethylene, alpha-olefin or ethylene-polar monomer. The alpha-olefin is 1-pentene, 1-hexene, 4-methyl-1-hexene, 1-octene, 1-decene, 1-dodecene, 4-ethyl-1-hexene, 5-methyl-1-heptene, 5-ethyl-1-heptene or 4-propyl-1-decene. The ethylene-polar monomer is 2,2-dimethyl-4-pentenol, 2,2-dimethyl-6-heptenol, 2,2-dimethyl-4-pentenoic acid, 6-vinyl-1-hexanol, 8-vinyl-1-octanol, 10-vinyl-1-decanol or vinyl acetate. The grafting initiator is tert-amyl peroxy neodecanoate, di-n-butyl peroxydicarbonate, di(2-ethylhexyl) peroxydicarbonate. The organic silicon grating monomer is vinyltrimethoxysilane, vinyltriethoxysilane, 3-methacryloxy propyl trimethoxy silane.