The invention discloses an ionic conduction membrane. The ionic conduction membrane includes an ionic conduction membrane substrate layer. The ionic conduction membrane substrate layer is provided with a cover layer. The swelling rate of the material of the cover layer is not high than 0.5 times of the swelling rate of the material of the ionic conduction membrane substrate layer. The material of the cover layer is at least one selected from ceramic powder, ethene-tetrafluoroethene copolymer, polytetrafluoroethylene, polyvinyl chloride, polypropylene or epoxy resin. The ionic conduction membrane substrate layer is provided with the cover layer, and therefore swelling does not occur when the ionic conduction membrane is in contact with water, and a simple, convenient and feasible dry-pack assembling process can be achieved. Compared with wet membrane assembling in the prior art, the coulombic efficiency and the energy efficiency of cells are increased by 2-3%. In addition the service lifetime of a fluid cell is greatly prolonged.