TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The cross-linking agent is obtained by employing sulfuryl fluoride, sulfonyl chloride or sulfonyl bromide resin, ammonia, hydrazine, diamine or other material. The fluorine-containing allyl monomer with functional group containing cross-linked sites is obtained by heating strong protonic acid and Lewis acid. The strong protonic acid is selected from sulfuric acid, trifluoromethanesulfonic acid or phosphorous acid. The Lewis acid is selected from zinc chloride, ferric chloride, aluminum chloride, organic tin, organic stibium or organic tellurium.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The fluorine-containing cross-linked film also includes a polymer composed of fluorine-containing olefin, one or multiple fluorine-containing allyl monomers with functional group and one or multiple fluorine-containing allyl monomers with functional group containing cross-linked sites or their mixture. The fluorine-containing olefin is selected from polytetrafluoroethylene, chlorotrifluoroethylene, ethylene chlorotrifluoroethlyene, hexafluoropropene or vinylidene fluoride. The fluorine-containing allyl monomer with functional group is selected from group of general formulae (II-IV). Y1(CF2)a(CFRf1)b(CFRf2)cO(C(CF2X)FCF2O)nCF=CF (II) Rf3CF=CF(CF2)dY2 (III) CF2=CFOCF2C(CF2OCF3)FOCF2CF2Y3 (IV)a, b, c=0-1;d=0-5;n=0-1;Rf1 to Rf3=perfluoroalkyl or alkyl chlorofluorosilane;X=F, Cl, Br or I;Y1 to Y3=SO2M, COOR3 or PO(OR4)(OR5);M=Br, F, Cl, -OR or -NR1R2;R=methyl, ethyl, propyl, H, Na, Li, K or ammonium group;R1 and R2=H, methyl, ethyl or propyl; andR3 to R5=H, Na, Li, K, ammonium group, methyl, ethyl or propyl.The fluorine-containing allyl monomer containing cross-linked sites is selected from group of general formulae (V-VI). CF2=CFRf4Y4 (V) Y5(CF2)a'(CFRf5)b'(CFRf6)c'O(CFCF2O)n'-CF=CF2 (VI)Y4 and Y5=Cl, Br, I or CN;a',b' and c'=0-1;X1=F, Cl, Br or I;n'=0-1; andRf4 to Rf6=perfluoroalkyl.    TECHNOLOGY FOCUS - POLYMERS - Preparation (Claimed): The fluorine-containing cross-linked film is manufactured by introducing fluorine-containing ion-exchange resin, cross-linked agent, acid and/or free radical initiator and other additives to solution to form a mixture. A film is formed on a plate by using the prepared mixture by curtain coating of the solution. The solution is cast through silk screen printing or spin coating process at 30-100 degrees C. The cross-linked agent has general formula (VII). The free radical initiator is organic peroxide of general formulae (VIII-IX), azo initiator and other material. The azo initiator is selected from azole, dimethylformamide, azobisisobutyronitrile, 2,2'-azobis-2-methylbutyronitrile, 2,2'-azobis-2,4-dimethylvaleronitrile, dimethyl 2, 2'-azobis(2-methylpropionate), 1-((cyano-1-methylethyl)azole)methanamide, 4,4'-azobis(4-cyanovaleric acid) or 3-hydroxy-4-nitrobenzoic acid. The free radical initiator is perfluoro organic peroxide. X2Rf7X3 (VII) R1OOR2 (VIII) R3OCOO-OCOOR4 (IX)X2 and X3=Cl, Br or I;Rf7=perfluoroalkyl or alkyl chlorofluorosilane;R1 and R2=alkyl group replaced with 1-20C alkyl group or aryl group, 1-20C acyl group, 1-20C aroyl group, alkyl group replaced with fluorine-containing perfluoroalkyl alkyl group or 1-20C aryl group, fluorine-containing 1-20C perfluoroalkyl acyl group, or fluorine-containing 1-20C perfluoroalkyl aroyl group; andR3 and R4=alkyl group replaced with 1-20C alkyl group or aryl group, alkyl group replaced with fluorine-containing or 1-20C perfluoroalkyl alkyl group or aryl group.