The invention relates to a microporous film reinforced multi-layer fluoric cross-linked ion film and a preparation method thereof, pertaining to the field of functional macromolecular composite materials. The ion-exchange film has a multi-layer structure, and the multiple layers contain microporous films (used as reinforcement) and cross-linked mesh structures. The ion-exchange film prepared by the method has relatively high high-temperature electric conductivity, dimensional stability and mechanical strength.