The Seepage analysis of slope is aimed at calculating seepage factor so as to provide essential data for the stability analysis of slope and selecting reasonable design scheme of consolidation or seepage drainage. For results calculated by numerical method can meet the conditions and requirements of practical engineering, this paper adopts numerical method to calculate the underground water seepage in slope of Zijingshan Open Pit Gold Mine. The conclusions drawn from the analyses follow as: because the level of underground water is more low, the flow direction of natural underground water is opposite to the slope face, after final slope being achieved, as a result of draining action of slope face, the slope is stable dry slope; the calculated level of underground water is based on present statistics, the actual level of underground water can be obtained only if the hydrogeologicalc model concerning fissure water is established though finite work.