Abstract: Focused on the environmental soil sample contaminated by spent fuel, a Pm separation procedure was established with a recovery greater than 70% for Pm and the decontamination factor greater than 10³ for the interference elements. The activity of ¹⁴⁷Pm standard sample was determined by liquid scintillation counting (LSC) with the efficiency tracing method (ETM), giving a relative deviation less than 0.5%. The analysis method of ¹⁴⁷Pm was validated for simulated polluted soil sample (prepared by mixing the spent fuel with environmental soil) and the results are in good agreement with the referenced data with a relative deviation of 2%.