Abstract: The stability of composite slope,within first mining area in the 3rd Baiyinhua opencast coal mine,was analyzed.By using the Lizheng software,the stability factor,which was calculated by adopting traditional limit equilibrium method,was considered as an indicator,and the sensitivity of factors,such as seismic effect,cohesion,friction angle,ground-water level and density is smaller in order to the slope stability according to multi-factor sensitivity analysis.The research conclusion coincides with engineering actuality.