Abstract: In order to identify the types, level and migration law of natural radionuclide in ionic rare earth during its development and utilization process, the natural radionuclide in raw ore, waste residues and wastewater of south ionic rare of Gannan region, Jiangxi province were investigated.The results showed that: the natural radionuclide in rare earth raw ore in An'yuan and Longnan is with high content, in which the specific activities of natural U, ²²⁶Ra and ²³²Th are 3.69×10⁴, 8.33×10³ and 3.40×10³ Bq/kg respectively; And the specific activities of the acid-soluble slag are 2.58×10⁴, 2.81×10⁴ and 2.75×10⁴ Bq/kg respectively; The radioactive level of natural U and ²³²Th in some rare earth tailings, and the specific activity of natural U in the neutralizing slag of some individual enterprises is higher than national standards' exemption level (1 000 Bq/kg). Also, the total content of Th and U in the efflux wastewater of some rare earth enterprises efflux wastewater are higher than the national emission standards limit (0.1 mg/ L).

Key words: rare earth, natural radionuclide, Gannan region, investigation