129I is a long life radionuclide. During the analysis of 129I in soil samples, mixed-alkaline fusion and alkaline-peroxide fusion were used for sample digestion. The results show that the former method is simpler than the latter except for a little lower 129I is a long life radionuclide. During the analysis of 129I in soil samples, mixed-alkaline fusion and alkaline-peroxide fusion were used for sample digestion. The results show that the former method is simpler than the latter except for a little lower