Abstract: It is usually considered that there is less occurrences and rare possibility of large landslides in the meandering valley near the waterhead in the upper reaches of the Minjiang River, since this area has slow uplift of the earth’s crust, wide valley, slow bank slope, and less rainfall. However, it is found by the author’s survey in recent years that there are a lot of large landslides developed along the meandering river in the upper reaches of the Minjiang River from the Hongqiao Pass to the Xining Pass. Most of them are characterized by seismic landslides, and a few landslides have the signs of resurrection under the influence of river scouring and later engineering excavation. The Yuanbazi ancient landslide is selected as a typical example. This landslide developed on the concave bank of the Minjiang River, and is 780 m long and 480 m wide, and has a volume of 293×104 m3. Based on geological analysis, dating and numerical simulation, it is considered that this landslide is a typical large-scale rock ancient landslide in the area triggered by historical earthquakes, and it has experienced the evolution process of slope cracking, earthquake landslide, river downcutting and resurrection of the front. The stability calculation results show that the whole of landslide will be steady under the natural condition, and will be unsteady under the rainstorm conditions. Due to river erosion, rainfall, melting snow and other factors, local deformation and resurrection occurred. It is suggested that the monitoring of the landslide deformation should be strengthened to avoid blocking the river and threatening the safety of the Chengdu-Lanzhou Railway.