Ancient landslide is treated as modern landslide which result in unsuccessful treatments due to its concealment and scale, so it has always been a conundrum in the identification of ancient landslide. According to the characteristics of geomorphology, geologic conditions and deformation evidences, identification technology of ancient landslide are introduced, moreover, some conventional revival cases and their resurgent mechanisms of ancient landslide are studied and summarized. Ultimately, took some large-scale ancient landslide as an illustration, the landslide's toe was cut and relived owing to the construction of some highway engineering, nevertheless, stability analysis and targeted treating measures are carried out intimately on the basis of deformation and stability conditions, the landslide is treated successfully at last. Study achievements of this paper indicates necessary attentions should be paid for ancient landslide so that its deformation mechanisms could be understood and counter-measures could taken correspondingly which are crucial for ancient landslide treatment.