Abstract: This paper presents a case history of Baoshan landslide in the colluvial soils throughout the data collection and field mapping. The deformation and development of the Baoshan landslide are investigated, and the conditions and mechanism of the landslide are studied. On this basis, the residual thrust method was used to evaluate the stability of the landslide. The global slide of the potential area will cause serious hazards to the roadway at the toe of the slope and the residential development under construction, so it is necessary to analyze and study the potential factors that might contribute to the stability of the landslide.

Key words: landslide in colluvial soils, development characteristics, formation mechanism, stability analysis