Abstract: ijiapo slope is a paleo landslide in Baoji City. Based on inverstigation of hydrogeological and engineering geological factors of the slope, the form and material structure and deformation fracture features of surficial loess body of the slope are described, and the dynamic mechanism for paleo landslide is discussed in this paper. Using Sarma method for slope division in arbitrary way, the stability of the landslide are studied at natural (recent), earthquake and water saturation states or synchronously at three states. And then, its sensitivity analysis is made that stability change of surficial loess body can take plecs with groundwater table rising or lowering. General conclusion is that Dijiapo slope is stable, its surficial loess body will be unstable as groundwater table rising. Eventually, some control ways are put forward to it.