Abstract:meability coefficient of rock mass in fractured zone on nuclide migration was discussed by numericalsimulation software Visual Modflow. The results show that non-penetrating fractured zones causes nega⁃tive effects on the migration rate of nuclides. Nuclide concentration decreases quickly and then slowlyduring the migration and decay process. The influence of permeability coefficient of fractured zone onthe change of nuclide concentration decreases gradually with time.When the permeability coefficient ofthe fractured area was 30 times of that of the surrounding rock,the maximum nuclide concentration inthe groundwater decreases from 4.65×106Bq/L to 1.22 Bq/L within 90 years. The functional relation⁃ship of the maximum nuclide concentration,the diffusion time and the relative permeability coefficient isfitted asc=0.269 16×e-n/6.544 59+0.575 19×e-n/0.985 8+0.118 95. Close-