NOVELTY - A polymer film is placed in plasma processor, plasma-processed under argon atmosphere for 45-75 seconds, and polymer film is removed. 100-150 Pts. wt. plasma-processed polymer film and 1-20 pts. wt. spectrum conversion material obtained by reacting rare earth chloride is reacted with silsesquioxane, are added to flask, 0.01-1 pt. wt. light stabilizing agent, 0.01-1 pt. wt. ultraviolet absorber, and 0.01-1 pt. wt. initiator are added and dissolved in acetone, stirred with nitrogen gas, and naturally dried to obtain solar cell spectrum conversion polymeric film.    USE - Manufacture of solar cell spectrum conversion polymeric film for solar cell.    ADVANTAGE - The solar cell spectrum conversion polymeric film is easily manufactured with high light transmittance and favorable weather resistance, and provides solar cell having high photoelectric conversion efficiency and durability.    DETAILED DESCRIPTION - Alkyl chloride is dissolved in silsesquioxane to form silsesquioxane solution with concentration of 0.35-0.45 g/mL, and rare earth chloride is added to the solution, reacted at 130-190 degrees C for 20-40 minutes under nitrogen protection and cooled to room temperature to obtain a solution (A). The mass ratio of rare earth chloride and silsesquioxane is 900:1. Ammonium fluoride and sodium hydroxide are mixed in mass ratio of 140-150:90-100, dissolved in anhydrous methanol to obtain mixed solution. The mixed solution is added into the solution (A), and stirred at 40-60 degrees C for 20-40 minutes, and solvent is evaporated, to obtain a solution (B). The solution (B) is heated at 280-300 degrees C under nitrogen protection for 40-60 minutes, naturally cooled to room temperature, washed with ethanol, centrifuged, separated and washed with anhydrous ethanol for 2-3 times to obtain spectrum conversion material. A polymer film is placed in plasma processor, plasma-processed under argon atmosphere for 45-75 seconds, and polymer film is removed. 100-150 Pts. wt. plasma-processed polymer film and 1-20 pts. wt. spectrum conversion material are added to a three-necked flask, 0.01-1 pt. wt. light stabilizing agent, 0.01-1 pt. wt. ultraviolet absorber, and 0.01-1 pt. wt. initiator are added and dissolved in acetone, and stirred with nitrogen gas under reflux for 5-6 hours. Acetone is evaporated, product is removed, and naturally dried to room temperature, solar cell spectrum conversion polymeric film is obtained.