Taking a landslide in Shaanxi as an example, the influence of relative position of mine caves that parallel to the strata and weak-soft zone on slope stability is studied by using the discontinuous deformation (DDA) theory.On the basis of the landslide' s characteristics, basic geological conditions and mechanical parameters, the landslide practical model for calculation and analysis is established.The analysis results show that the mine caves affect the distribution of slope stress field and different relative positions of mine caves and weak-soft zone have different effects on the slope stability.If the distance between mine caves and weak belt is 2-5 times longer than the height of mine cave, the stability of slope will be reduced.When the distance between mine caves and weak belt is 5-6 longer times than the height of mine cave, the slope is the most dangerous, and then relieves with increasing distance.When the distance between mine caves and weak belt is more than 8 times longer than the height of gob, slope will be safe.