TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The metal in the sulfuryl fluoride lateral group vinyl ether monomers of the polymer is tungsten, chromium, vanadium, zinc, lanthanum, molybdenum, cerium or manganese, preferably tungsten, molybdenum, lanthanum, cerium or manganese. The per-sulfate comprises ammonium sulfate, alkali metal persulfide or alkaline-earth metal persulfide, preferably, ammonium persulfate or potassium persulfate.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The perfluoroalkyl peroxide comprises perfluoro propenyl peroxide, 3-chlorotrifluoro propionyl peroxide, perfluoro methoxy acetyl peroxide, omega -H-perfluoro butyryl peroxide, w-sulfonyl fluoride-perfluoro-2,5,8-trimethyl-3,6,9-trioxane undecyl peroxide, 2,2,3,3,4,4,4-heptafluorobutanoic peroxyanhydride, 2,3,3,3-tetrafluoro-2-(perfluoro propoxy)propanoic peroxyanhydride, 3,3,4,4,4-pentafluorobutanoic peroxyanhydride or 2,2,3,3-tetrafluoro-3-(trifluoromethoxy)propanoic peroxyanhydride.    TECHNOLOGY FOCUS - POLYMERS - Preparation (Claimed): The preparation of the resin comprises carrying out copolymerization of tetrafluoroethylene, two sulfuryl fluoride lateral group vinyl ether monomers with different structures and two sulfonate lateral group vinyl ether monomers at 10-60 degrees C in the presence of an initiator, where the reaction time is 1-8 hours and the reaction pressure of 2-10 MPa and the initiator is difluorodiazine, perfluoroalkyl peroxide or persulfate. Preferred Components: The polymer comprises (in mol%) tetrafluoroethylene (75-85), the sulfuryl fluoride lateral group vinyl ether monomers (14.75-24.95) and the sulfonate lateral group vinyl ether monomers (0.05-0.25). The structure formula of the two sulfuryl fluoride lateral group vinyl ether monomers with different structures are (F2C=CF-O(CF2)p-SO2F) and (F2C=CF-O(CF2)q-SO2F). The structure formula of the sulfonate lateral group vinyl ether monomers are (F2C=CF-O(CF2)p-S-O3)nM(n+) and (F2C=CF-O(CF2)q-S-O3)mM(m+). Preferred Method: The copolymerization reaction is an emulsion polymerization in the water phase, where the sulfonate lateral group vinyl ether is used as a dispersing agent and also as a reaction monomer and the amount of water in the reaction system is 1-12 wt.%. The preparation of the functional ion exchange resin comprises: (i) adding pure water, sulfuryl fluoride lateral group vinyl ether and sulfonate lateral group vinyl ether in a clean reaction kettle, where the total mass percentage concentration of the sulfuryl fluoride lateral group vinyl ether is 5-50%, and that of the sulfonate lateral group vinyl ether is 1-12%; (ii) expanding the tetrafluoroethylene monomer in the reaction kettle through a gas metering groove at a pressure of 2-10 MPa; (iii) rising the temperature of the reaction kettle to 10-60 degrees C, adding the initiator to the reaction system through the metering pump for inducing the reaction, supplementing tetrafluoroethylene monomer and the initiator continuously to the reaction kettle for maintaining the reaction pressure at 2-10 MPa and the reaction time to 1-8 hours; and (iv) completing the reaction, removing and recycling the non-reacted tetrafluoroethylene monomer through an evacuation pipeline and a recycling groove, obtaining a milky white polymer slurry and adding into a post-treatment apparatus through a discharging system, shearing at a high speed for obtaining a white polymer powder and drying it in a baking box at 100 degrees C for acquiring the functional perfluoro resin with sulfuryl fluoride and sulfonate lateral group; (v) the sulfuryl fluoride vinyl ether monomer and the sulfonate lateral group vinyl ether in the reaction liquid are recycled through the recycling system, the perfluoro alkyl peroxide comprises peroxide perfluoro alkyl acyl compound, peroxide perfluoro alkoxy acyl compound; peroxide part fluorine-containing alkyl acyl compound and peroxide part fluorine-containing alkoxy acyl compound.