Pseudo-soil cutting slope is an important type of slope in engineering construction with obvious differences between pseudo-soil slope and soil slope in terms of engineering characteristics. It is of great significance to get an in-depth understanding of engineering characteristics and instability mechanism on the pseudo-soil slope for safety construction and assessment during operation period. Based on the geological properties of highway pseudo-soil cutting slope and the influence factors of slope deformation, according to the example of K5 landslide deformation monitoring and early warning of Panxing highway, a landslide early warning method is put forward with displacement velocity ratio as early warning reference value, which made successful early warning in the left slope of ZK5 410～485 in Songtao-Tongren 1 bid section to avoid the casualties and reduce the economic loss, which provides useful guidance for engineering design, post-construction control and safety operation of pseudo-soil cutting slope.