Abstract: The bearing capacity traffic analysis of the surrounding network road for aiming project is an important part of the Traffic Impact Analysis.Firstly, combined with random equilibrium(SUE) model and OD estimation theory, this paper proposed the analysis method for the surrounding network bearing capacity of aiming project based on OD-estimation function section of TransCAD, and then took bearing capacity analysis of surrounding network in the third phase projection of Chongqing Inch Beach as an example, finally, based on the analysis put forward some measures to solve the problems of bottleneck section.