Abstract: It rained frequently in Anshan city from July to August in 2010, and Causing lots of the geological hazards in urban area, such as landslip, landslide etc. The authors calculate the man-made rock slope of Duilujie No.42 through the limit equilibrium methods, meanwhile, and to account for the structural surface and slip direction analysis of landslip in methods of stability of three-dimension slide wedge. Through this paper, the authors want to provide the experiences about the evaluation of the slope stability in similar city.