Abstract: In the field of landslide disaster prevention and control, its formation and evolution mechanism has been one of the hot issues. Previous scholars have not studied the Songjiayao Village landslide in Qishan County. This paper has analyzed the basic characteristics of the landslide, discussed its formation conditions, and finally analyzed the evolution mechanism of the landslide. The results show that the Songjiayao village landslide is located in the slope zone along the Northern Bank of Weihe River, which is formed on the basis of the revival of ancient landslides and consists of old landslides and new landslides. Both new and old landslides slide are developed along the ancient landslides, and the landslide body is mainly loess-like soil. The old landslides are caused by natural factors, while the new landslides are caused by the revival induced by human engineering activities, and these slides are formed by combined action of multi-factor coupling. The basic characteristics and evolution mechanism of this landslide has a certain universality in the loess landslide along the Northern Bank of Weihe River, which can provide a certain reference value for the prevention design and early warning and prediction.