NOVELTY - Preparing perfluoro-resin with side group of sulfuryl fluoride and ether end group comprises ternary copolymerization of (mole content percentage occupied in the polymer) 0.01-5% alkyl ether end group alkene ether monomer (A), 48-84.9% tetrafluoroethylene (B), and 15-47% sulfuryl fluoride end group alkene ether monomer (C). The end groups at two ends of the molecular main chain of the polymer can be alkyl containing fluorine, perfluoro-sulfuryl fluoride end group, difluoromethyl (CF2H) end group or hydrocarbyl.    USE - The method is useful for preparing perfluoro-resin with side group of sulfuryl fluoride and ether end group which is useful for manufacturing the ion exchange membrane of the fuel battery or the chlorine-alkali electrolytic cell (all claimed).    ADVANTAGE - The perfluoro-resin with side group of sulfuryl fluoride and ether end group fabricates the perfluoro ion exchange membrane which has not only resistance to various chemical mediators but also high conductivity and mechanical strength and low membrane resistance.    DETAILED DESCRIPTION - Preparing perfluoro-resin of formula -(CF2-CF(O-(CF2-CF(CF3)-O)a-(CF2)b-O-R))p-(CF2-CF2)n-(CF2-CF(O-(CF2-CF(CF3)-O)c-(CF2)d-O-SO2F))m- with side group of sulfuryl fluoride and ether end group comprises ternary copolymerization of (mole content percentage occupied in the polymer) 0.01-5% alkyl ether end group alkene ether monomer (A), 48-84.9% tetrafluoroethylene (B), and 15-47% sulfuryl fluoride end group alkene ether monomer (C). The end groups at two ends of the molecular main chain of the polymer can be alkyl containing fluorine, perfluoro-sulfuryl fluoride end group, CF2H end group or hydrocarbyl.    a=0-3;    c=0-3;    b=1-6;    d=1-6;    m, n, p=1-1000; and    R=CxH2x+1; and    x=1-4.    INDEPENDENT CLAIMS are included for:    (1) the preparing method of perfluoro-resin with side group of sulfuryl fluoride and ether end group; and    (2) the copolymerization reaction comprising (1) the copolymerization carried out in the solvent: adding the solvent, fluorocarbon solvent or fluoro chloro-alkanes, according to weight ratio for perfluoro-sulfonyl monomer to solvent of 2-5:1; (2) in the water phase, the dispersion copolymerization or the suspension copolymerization are carried out under the situation that there is dispersant existed; the dispersant is perfluoro alkyl carboxylate, perfluoro alkoxy carboxylate, perfluoro alkyl sulfate, perfluoro alkoxy sulfate, triazine dispersant, or perfluoro carboxylic acid ammonia salt; (3) in the water phase, the emulsion polymerization is carried out; the concentration of the emulsifier is 0.2-3%; the emulsifier contains negative ionic emulsifier and non-ionic emulsifier; the negative ionic emulsifier contains sodium soap, lauryl sodium sulfate, alkyl sodium sulfonate, and alkylaryl sodium sulfate; the non-ionic emulsifier contains alkylphenol polyether polyol such as nonyl phenol ethoxylate, polyoxyethylene fatty acid, and ether fatty acid; (4) bulk polymerization, the polymerization is carried out to the monomer itself under the effect of the evocating agent.