Abstract: For the treatment of silica based ammonium molybdophosphate (AMP/SiO₂) adsorbents after separation of cesium from simulated high level liquid waste, allophane, mordenite, zeolite 4A and clinoptilolite were respectively chosen as the base materials to synthesize the silicate ceramic solidified bodies with pressing/sintering method. The microstructure, phase composition and surface element distribution of the solidified bodies were analyzed. The solidification mechanism, leaching resistance and radiation resistance of the solidified bodies were also discussed. The surface of the solidified bodies appears melting phenomenon at 1 200 ℃, and the structure is more compact. The pollucite crystal phase (CsAlSi₂O₆) is recrystallized in the allophane based solidified body, which can effectively suppress the volatilization of the cesium element, and the cesium immobilization ratio reaches 93.1%. With the irradiation of 500 kGy γ ray, there is no change of the main crystal phases of the solidified body, and the leaching percentage of Cs is only 0.79% after leaching in deionized water at 25 ℃.