▎ 摘　　要

NOVELTY - Solidification method of radioactive nuclide involves (s1) mixing soluble zirconium salt and radionuclide-containing solution to obtain mixture (A), (s2) mixing the mixture (A) and orthosilicate compound, subjecting to gelation reaction, calcining the obtained gel, and (s3) curing calcined radionuclide in zirconium silicate. USE - Solidification method of radioactive nuclide e.g. uranium, plutonium, thorium, cesium, lead and radium (all claimed). ADVANTAGE - The method uses soluble zirconium salt and ethyl orthosilicate as raw materials to prepare zirconium silicate, and introduces radioactive nuclide into the lattice of zirconium silicate in the preparation process, thereby reducing the leaching rate of the radionuclide.