Abstract：The statically stable slope would not be stable when earthquake happens. When earthquake happens，the potential sliding body suffers some dynamic load，in addition to the pore water pressure arising and the anti-sliding force on potential sliding surface decreases due to the anti-shear strength of rock and soil body decreasing. Therefore，it is not sufficient only to make static calculation for important slope. In the present paper，as an instance，the seismic stability of the slope at the north bank of Fengjie Changjiang river bridge is studied by transfer-coefficient method，based on the detail exploration and the seismic hazard analysis for the engineering site.
