///Based on the detailed fieldwork and the system analysis for the Huanglashi Dashiban landslide of the Three Gorges region, the general situation of the Danshiban landslide and its plan of draining water are introduced, and its groundwater level monitoring is analyzed. Then eight underground drainage plans of the landslide are simulated in terms of the analyzing and computing of the geo-slope, and thus the preferred plan is that the position of the underground dry well and drainage gallery is arranged in the Front-middle part of the Dashiban landslide for draining water effect and efficient.