Introduction of mix-well slide stability by means of mix-well conception into a scheme of landslide control can improve landdrainage to lower groundwater level existing in landslide mass. Qualitative analysis of improving landslide stability by mix-well drainage is present in this paper, providing applicable conditions for application of mix-well drainage to landslide control. Taking landslides occurring in Bojishan of Baoji as an example and in combination of numerical simulation of three-dimensional model created by the software Modeltlow, a prioritization scheme is given for application of mix-weU drainage to landslide control.