Abstract: Baota landslide,a typical ancient rock slide,is used as an example to show why there are still mistakes in its boundary even after three times geological investigation in large scale have been carried out.It involves many problems like the evidence for the determination of ancient landslide,methods of analysis and identification,direction and method of exploration.The determination of landslide mainly depends on the geological phenomena and topography.In addition to the evidence of slide plane,there are multiple solutions for the phenomena of geology,topography and morphology.Thus a synthetic comparison and analysis of multiple factors should be conducted.The fallacy is pointed out for the slope body of Wang-Jialiang which is determined as the western slide body of Baota landslide.Evidences on the geological phenomena and topography are provided.Methods of identification of ancient landslide based on landslide geomorphology and topography are presented in this paper.Lessons,which are learned from the survey and exploration of the landslide,are discussed at last.