The invention belongs to the technical field of application of hydrogen separation materials, and discloses a dual-phase ceramic material of homologous double perovskite, a preparation method and application thereof. The material is prepared from a proton-conducting phase and an electron-conducting phase, and both the proton-conducting phase and the electron-conducting phase are perovskite ceramic materials. The method is (1) weighing the raw materials of the proton-conducting phase and the raw materials of the electron-conducting phase according to the stoichiometric ratio, respectively adding organic solvents, ball milling, pretreatment, and roasting to obtain the proton-conducting phase and the electron-conducting phase; (2) Mix the proton conductive phase and the electronic conductive phase, add an organic solvent, ball mill, and then place it in a mold to form a green embryo; put the green embryo in a furnace, raise the temperature to 1300℃~1500℃, keep it warm for 10~20h, and cool down , to obtain a dual-phase ceramic material of homologous double perovskite. The prepared dual-phase ceramic material has good chemical stability and thermal stability, high hydrogen permeability, and is suitable for long-term industrial practical operation reactions.