In order to obtain the ideal aerodynamic performance in automobile styling structure design, such process as parametric geometry modeling and modification, meshing, CFD flow field calculation, sampling and optimization design, which are rather time-consuming and laborious, must be carried out. In view of this, based on parametric geometry modeling and on the secondary development of UG, the data exchange of geometric models can be realized, and the automatic mesh command of ICEM is set up based on script files, with the operation log files set up to achieve CFD boundary conditions, control equations and parameter calls. Then, by in Isight software, batch processing files are used to realize such links as data calls, startup, shutdown and other related operations, including geometric model modification, mesh generation and fluid analysis and calculation, so as to establish an efficient integrated optimization technology. This method can be verified by the aerodynamic drag reduction of the international standard mode with attachment. The results show that the Isight integrated optimization platform could highly integrate with UG, ICEM and FLUENT, which could realize automatic three-dimensional model modification, meshing and flow field calculation. It could reduce the manual operation and errors, thus saving a lot of time and computing resources, which will greatly improve the optimization efficiency.