The present invention relates to a method for preparing an inorganic-inorganic ion exchange complex for treatment of radioactive waste liquid, and more particularly, to a solution in which a ferrocyanide-based inorganic ion exchanger powder is dispersed in an organic solvent, alkoxy silane, water sol-gel reaction after the addition of water and catalyst to synthesize the inorganic-inorganic ion exchange complex in which the ferrocyanide-based inorganic ion exchanger is immobilized on silica to form a continuous particle in the column for continuous treatment of the radioactive waste liquid in the column The inorganic-inorganic ion exchange complex of the present invention is shown.
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