The Lüliang airport landslide is a large loess landslide which was found in early construction of the airport. Due to airfield runway next to the northeastern of the landslide

the landslide makes a large influence on the engineering construction and safe operation. In order to assess landslide risk and prevent its damage

the geological features and formation mechanism of the landslide are analyzed based on the detailed engineering geological investigation and testing work. The landslide is considered as a multilayer landslide developed in loess layer. There are three steps on the landslide; and the main sliding surface locates in the paleosol layer of Lishi loess. Three-dimensional geological model is established using GIS; and the stability of the landslide is evaluated by limit equilibrium method and shear strength reduction method. Results from three-dimensional limit equilibrium analyses show that most parts of the landslide are stable or basic stable in natural state. From strength reduction analysis

the safety factor of the whole slope is 1.26. It is shown that the most dangerous areas appear in the posterior margin of landslide II and landslide I-3. In case of loading or rainfall condition

it is likely to slide again. In conclusion

three-dimensional stability analysis can more truly reflect the actual state of landslides

especially for complex landslide.