Abstract: In order to solve the problem of distribution of landslide thrust on front pile of double row antisliding piles and the calculation formula of the front row pile soil resistance. The mechanism of two types soil-arching( end bearing arching,frictional arching) was introduced,then the ultimate bearing capacity of each type of soil arch was deduced and the analysis of the distribution of landslide thrust on front pile,soil resistance of front piles and the space of front and rear piles through the multilayer soil arching effect of double row piles was conducted.Conclusionswas drawn as follows. The soil resistance of front pile almost does not exist,when the double piles can completely resist landslide thrust,and the distribution of landslide thrust on double piles are the same,and the space of front and rear piles is no less than rise plus a half thickness of soil-arching. Finally examples were demonstrated to verify the result of paper.