Abstract: According to the basic principles of the seepage field，the stress-fluid coupling analysis，the governing equation and the mathematical model，based on general finite difference method FLAC software analysis platform，the stability with the consideration of seepage effect of 1st and 2nd stage slope of Xudonggou Mine of Anqian Mining Company of slope stability analysis is studied.The results indicate that the quartz chlorite schist along the dip layers is controlling factors of influence of the slope stability.Because of the poor stability of the quartz chlorite schist，there is still instability problem in the design of 2nd stage slope.The migmatite at the beginning of production has well stability，but when the quartz chlorite schist outcropped，slope instability problem still arise.Therefore，it is recommended that local adjustment of 2nd stage slope in order to ensure the safety production of mine.

Key words: Seepage-stress coupling, FLAC, Slope Stability