Abstract：According to the location and characteristics of embeded anti-slide pile in high rock slope，the mechanical behaviour of non-anchored section of pile is analyzed. Both thrust behind pile and resistance in the front of pile is rationally simplified as rectangulaly and triangulaly distributed loads，respectively. Based on this mechanical model，the calculation procedure of internal force of embeded anti-slide pile is given. Taking the section K101+240 of Beijing-zhuhai Expressway in the north of Guangdong province as an example，the calculation results of embeded and cantilever anti-slide piles are carulated. The results show that the distribution of internal force of embeded anti-slide pile is relatively reasonable，and the length of anchorage section is properly shorten.
