Abstract：
In the process of driving pile of lime-soil pile, the radical expansion of pile hole makes radical pressure which causes surrounding soil layer compact within limits. Thus the pile and its surrounding compaction soil compose artificial composite foundation. This kind of composite foundation will place a crucial role in load carrying capacity and eliminating the collapsibility of loess. Numerical analysis could effectively analyze the influence of lime soil compaction pile, it also help designers to determine parameters like pile spacing and pile length．
