Abstract: The improvement of permeability is the key technological approach to resolve the hard leaching problem of low grade argillic gold.To deal with this kind of hard leaching ore，some sort of dispersing agent has been developed.The test samples are from Xinchang 2# ore body，Yakou 1# ore body，Laochangshan 2# blended ore body and Sb ore body，all located in Yunan Douyue mine field.Then the permeability experiments would be carried out with the content of dispersing agent by 0 %，6 %，9 % and 12%.The result shows that the dispersing agent could outstandingly improve the permeability of the ore samples.

Key words: Refractory leaching gold, Permeability, Dispersing agent