NOVELTY - A multi-layered fluorine-containing cross-linked doped ion membrane with reinforced fiber comprises 2-40 mono-membranes with the fluorine-containing ion exchange resin as the base; where at least one mono-membrane comprises cross-linked netted structure, mono-membrane is added with inorganic adulterant comprising the water-holding function or proton exchange function, and mono-membrane is added with fiber as the reinforce.    USE - The multi-layered fluorine-contained cross-linked doped ion membrane with reinforced fiber is used for functional polymer composite material.    ADVANTAGE - The multi-layered fluorine-contained cross-linked doped ion membrane with reinforced fiber has higher proton conductivity and dimension stability.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are: (1) method for forming the cross-linked compound of Formula I comprising: forming cross-linked compound under the heat, light, electronic irradiation, plasma, X-ray or organic peroxide, azo type initiator, or forming cross-linked compound in the presence of cross-linking agents; forming the cross-linked compounds of Formula II and III comprises: (1) using vikane, sulfonic acid chloride or sulfonic acid bromide resin with amino, hydrazine or organic diamine to carry out chemical treatment to release amino, hydrazine or organic diamine by chemical reaction; forming the cross-linked compound of Formula IV comprises: treating fluorine-containing sulfoacid resin with chlorosulfonic acid; forming the cross-linked compound of Formula V comprises forming the fluorine-containing sulfoacid resin by forming the nitrile group site, sulfonic acid chloride resin or sulfonic acid bromide resin under strong protonic or Lewis acid; where cross-linking agent is of Formula XI:    X2 and X3=Cl, Br, or I; and    Rf7=perfluorine-containing alkyl or alkyl chlorofluorosilane.    ; and (2) preparation of multi-layered fluorine-containing cross-linked doped ion membrane with reinforced fiber comprising casting, extruding, heat pressing, spin coating, casting, screen painting, jet printing, dipping the solution or liquid melting; multi-layered membrane is prepared by the mono-membrane composition, composition between multi-layered membrane and mono-membrane, or between multi-layered membrane and the multi-layered membrane, or can be directly prepared on the mono-membrane or multi-layered membrane.