Abstract: The Kajiwa landslide is a large bedrock and ancient landslide which is located in the left bank in downstream of the plan to build the dam site of the Kajiwa hydropower station of the Muli River, and it is the typical representative of the bendcrack landslide in high mountains and canyons in western Sichuan. Based on the study of the history of the rivervalley landforms, the formation mechanism of the landslide is elaborated. According to the macro analysis and quantitative calculation method, the stability of landslide is evaluated. Therefore, the results have a certain significance in the study of the same type of landslides.