The foreland fold and thrust belts locating between the stable Craton basin and rejuvenated Orogen is the common geologic appearances result from the collision between India plate and Eurasia plate in Cenozoic in the midlle-west China. It’s also the directive result from the Tibet plateau uplifting and pushing toward east and north. The foreland fold and thrust belts absorbed the thrust structural displacement coming from Orogen and make it disappear in the stable Craton basin. The authors have an opinion that the wedge structure is a main way of thrust structural displacement fade-away after analyzing the geometry and kinematics in the south Junggar basin. The wedge structure is made up of two faults both connecting together and their oppositional direction of thrust structural displacement, and the wedge shape geologic body between the two faults. The wedge structures are classic in the south Junggar basin, which also controlled the distribution scope of fold and thrust belt and structural deformation ways. The thrust structural displacement coming from rejuvenated northern Tienshan Orogen propagated toward Craton basin same as the other foreland fold and thrust belts. The thrust structural displacement of subsurface is almost absorbed by the wedge structure with thrusting backward Orogen. For example, when the thrust structural displacement is entirely absorbed by wedge structure in the first row fold and thrust belt, the fold uplift highest and no structural deformation in front of the fold in Kalaza anticline, but the fold uplift lower and existing the second, even third row fold when the displacement is kept and still propagated toward Craton basin in Qigu anticline. The amount of absorbed thrust structural displacement decide the anticline height and strata multiple times superposition