TECHNOLOGY FOCUS - CERAMICS AND GLASS - Preferred Components: The reinforcing fiber can be glass fiber or ceramic fiber. The glass fiber is alkali-proof glass fiber or alkali-free glass fiber. The ceramic fiber is natural flint clay or aluminum silicate fiber.    TECHNOLOGY FOCUS - CHEMICAL ENGINEERING - Preferred Method: The preparation method comprises dispersing fluorine-containing ion exchanging resin, fiber as reinforcement, crosslinker, acid and/or free radical initiator into a solvent to prepare a mixture, where the mixture contains 1-80% fluorine-containing ion exchanging resin; preparing the mixture into a film through solution casting, silk screen printing technique, spin coating, spray coating or soaking technique on plate; heat treating the film at 30-300 degrees C for 10-100 minutes; forming crosslinked lattice construction of formula (I); and placing the processed film into a mixture of fluorine and nitrogen gases to obtain fiber reinforced fluorine-containing cross linking ion film. During the film preparation, the solvent is thermally treated at 80-250 degrees C for 20-60 minutes. The step of forming the crosslinked lattice construction (I) comprises utilizing heat, light, electronic radiation, plasma, X Rays or radical initiator, and crosslinking agents.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The reinforcing fiber can be mineral fiber and/or oxide fiber. The mineral fiber is quartz fiber, silicon carbide fiber or basalt fiber.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The solvent can be dimethyl formamide, dimethyl acetamide, dimethyl sulfoxide, N-methyl ketopyrrolidine, hexamethylphosphoramide, acetone, water, ethyl alcohol, methyl alcohol, ethyl carbinol, isopropanol, ethylene glycol and/or propanetriol. The crosslinking agent can be of formula X-2Rf7X3. The radial initiator is organic peroxide or azo initiator. The peroxide initiator is of formula R-1OOR2 or R-3OC(O)O-OC(O)OR4. The azo initiator is azobisformamide, azodiisobutyronitrile, 2,2'-azodi(2-methylbutyronitrile), azobisisoheptonitrile, dimethyl 2,2'-azobis(2-methylpropionate), 1-(cyano-1-methylethyl)azomethanamide, 1,1'-azo(cyclohexyl-1-cyano), 2,2'-azo(2-methylpropylamidine)dihydrochloride, 4,4'-azobis(4-cyanovaleric acid) and 3-hydroxyl-4-nitrobenzoic acid.X2, X3=Cl, Br and I;Rf7=perfluoroalkyl and chlorofluoroalkyl;R1, R2=H, 1-20C alkyl or aryl substituted alkyl, 1-20C acyl, 1-20C aryl, 1-20C alkyl substituted with fluoroalkyl, perfluoroalkyl or aryl, 1-20C fluoroalkyl or perfluoroacyl, 1-20C fluoroaryl or perfluoroaryl; andR3, R4=1-20C alkyl or aryl substituted alkyl, 1-20C fluorine-containing or perfluoroalkyl or aryl substituted alkyl.Provided that R1 and R2 are not H simultaneously.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The reinforcing fiber can be fluoro-carbon polymer fiber including PTFE fiber, fluorinated ethylene propylene fiber, self-made fiber with ion exchange function or poly(fluoro propyl vinyl ether) fiber. Preferred Parameters: The reinforced fiber has diameter of 0.005-50 mu m, and length of 0.05-300 mu m. The reinforced fiber and the fluorine ion exchange resin are at mass ratio of 0.1-100:100, preferably 0.5-50:100.