Abstract: Based on monitoring data of two points of Maoping landslide, the cusp catastrophe modes are built. After studying with cusp catastrophe theory, it can be drawn that the two controlling variables (a and b) of model for monitoring point EJ14 are all bigger than 0, and controlling variable a of model for monitoring point EJ8 is less than 0, which indicates that Maoping landslide will be stable in total, and will be instable at local area.