NOVELTY - A solar cell packaging film comprises 100 pts. wt. packaging film substrate, 0.01-4 pts. wt. peroxide crosslinking agent, 0.01-3 pts. wt. co-crosslinking agent, 0.01-3 pts. wt. silane coupling agent, 0-1 pt. wt. light stabilizer, 0-1 pt. wt. UV-light absorber, and 5-20 pts. wt. spectral conversion material-grafted polymer particles.    USE - Solar cell packaging film.    ADVANTAGE - The method has good dispersibility. The packaging film utilizes lower energy infrared light, improves photoelectric conversion efficiency of solar cells, and it has low utilization rate of high energy UV-light.    DETAILED DESCRIPTION - A solar cell packaging film comprises 100 pts. wt. packaging film substrate, 0.01-4 pts. wt. peroxide crosslinking agent, 0.01-3 pts. wt. co-crosslinking agent, 0.01-3 pts. wt. silane coupling agent, 0-1 pt. wt. light stabilizer, 0-1 pt. wt. UV-light absorber, and 5-20 pts. wt. spectral conversion material-grafted polymer particles. The packaging film substrate is ethylene-vinyl acetate copolymer, ethylene-butene copolymer and/or ethylene-octene copolymer. The spectral conversion material-grafted polymer particles are prepared by mixing packaging film substrate, 20-60 nm oleic acid-coated rare earth spectrum conversion materials and initiator, reactively extruding, and graft copolymerizing to obtain crude spectrum conversion material-grafted polymer; and purifying through supercritical fluid processing, removing initiator, and granulating. The rare earth spectrum conversion materials are sodium yttrium fluoride (NaYF4):ytterbium (Yb)/thulium (Tm) and NaYF4:Yb/erbium (Er); NaYF4:terbium (Tb)/Tm and NaYF4:Tb/Er; NaYF4:Yb/Tm and NaYF4:Tb/Er; and/or NaYF4:Tb/Tm and NaYF4:Yb/Er, having ratio of 30-70:70-30 respectively. An INDEPENDENT CLAIM is included for preparation of packaging film comprising preprocessing spectral conversion material-grafted polymer particles; and mixing with remaining raw materials, adding into packaging film production machine, extruding, casting, rolling, and cutting.