TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Material: The dispersant is perfluoroalkyl carboxylate, perfluoroalkoxy carboxylate, perfluoroalkyl sulfonate, perfluoroalkoxy sulfonate, triazine dispersant and/or perfluorinated ammonium carboxylate salt. The emulsifying agent is anionic emulsifying agent and/or non-ionic emulsifying agent. The anionic emulsifying agent is sodium soap, sodium lauryl sulfate, alkyl sodium sulfonate and/or sodium alkylarysulfonate. The non-ionic emulsifying agent is alkylphenol polyether alcohol. The alkylphenol polyether alcohol is nonyl phenol polyoxyethylene ether, polyoxyethylene fatty acid or polyoxyethylene fatty acid ether. The solvent is deionized water. The auxiliary agent is chain transfer agent(s) of methanol, chloroform, cyclohexane and/or carbon tetrachloride. The initiator is perfluoroalkyl acyl peroxide or perfluoroalkoxy acyl peroxide. The perfluoroalkyl acyl peroxide is perfluorinated butyl acyl peroxide compound or perfluorinated propyl acyl peroxide compound. The perfluoroalkoxy acyl peroxide is perfluorinated propoxyl acyl peroxide compound.    TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The mol percentages of the vinyl fluoride, vinylidene fluoride and chlorotrifluoro ethylene in the copolymer is 6-30 (preferably 11-12)%. The microemulsion system comprises (mss%) dispersant (20-40), emulsifying agent (10-20), solvent (40-60) and auxiliary agent (balance). Preferred Property: The melt flow index of the quinary copolymerized fluoride-bearing resin under 297 degrees C and 5 kg of load is 2-60 g/10 minutes. The melting point of the quinary copolymerized fluoride-bearing resin is 240-280 degrees C. Preferred Method: The application of the resin involves using screw extruder to fuse and plasticize the high-transparency quinary copolymerized fluoride-bearing resin at 250-310 degrees C, casting and forming film through rack type mold, or forming film through annular mold with blow molding to obtain high-transparency solar encapsulating film having a thickness of 15-250 (preferably 30-150) mu m.