Abstract: In this paper, based on the representative seismic profile 28, a balanced cross section of Wu Wei basin is made by computer. So the basic style of structure and its evolution model of Wu Wei basin is established. The calculated results show that: the Lun-tou anticline is a multi-bend folding made up of superposed Silurian strata, the shortening of superposed Silurian system is 7.9km, the rate of shortening is 17.3%, the denudation of the fold in late evolutions reaches 2.5km. The tension distance by normal faults situated at the basin boundaries is 5.4km, the subsidence of the basin reaches 3.4km. The study in this paper is in accord with the geological data from neighbouring and deep structures.