The invention relates to a multilayer cross-linking organic doped fluoric ion film with reinforced fiber and preparation method thereof, belonging to the field of functional high molecule composite material. This fluoric ion exchange film has a multilayer structure, which is the reinforced fiber doped ion exchange film with network structure formed by using fluoric ion exchange resin containing cross-linking locus as film-forming resin and doping with reinforced fiber and inorganic substance meanwhile to perform cross-linking reaction under certain condition. The ion exchange film prepared bythis invention has high proton conductivity and dimension stability.