Preparation method of kularite ceramic solidifying body

The invention discloses a preparation method of a kularite ceramic solidifying body. The preparation method is characterized in that Ce2(C2O4)3.10H2O, An2 (C2O4)3.10H2O/oxide of An (An=Gd, Pr and Eu) and NH4H2PO4 are taken as raw materials; the high-quality kularite ceramic solidifying body is prepared according to formulation designing and the steps such as fine grinding, drying, granulating, forming, adhesive removing and vacuum hot-pressing sintering at a lower temperature. The kularite ceramic solidifying body prepared according to the preparation method is high in heat stability, mechanical stability, chemical stability and anti-radiation stability, is applicable to the safe solidification treatment of high-level waste, particularly applicable to the safe solidification treatment of high-level minor actinides waste which is high in radioactivity and toxicity, and long in half life period, and also applicable to the engineering application of high-level waste ceramic solidification treatment needing remot