In the current theory of bridge foundation design，all of the loads above the cap are loaded by the pile，and the bearing capacity of the soil among piles is not taken into account． In order to analyze the bearing capacity of the soil among piles in bridge pile foundation，a model of pile foundation is established based on a bridge foundation which is under construction，and by the finite element analysis software ANSYS． According to the results of finite element analysis ( FEA) and current bridge foundation design theory，a feasible composite pile foundation which can be applied in the design of bridge foundation，is recommended． Additionally，a number of modifications are made to the original design． It was confirmed that these modifications derived from numerical simulations can improve the performance of the foundation．