The Qiulitage structural belt situated in the front of the Kuqa fold-and-thrust belt,with a regional structural position being sandwiched in between the generating-drainage center of the Triassic-Jurassic source rocks in the Kuqa Depression and the front belt of the North Tarim Rise. There existed widely two layers of evaporite rocks in the Tertiary, with several sets of reservoir-sealing system and complicated structural styles in this area, so as to have an excellent geological conditions for petroleum geology. Based on the deformation characters of three structural sub-belts, namely, the east Qiulitage, west Qiulitage and Quele sub-belts,this paper analyzed the structural causes of the evaporate-above layer and the evaporate-below layer. It could be concluded that the formation of the evaporate-above layer resulted, structurally, from the flow of the evaporite rocks, evidenced by that the western part of the Qiulitage structural belt deformed stronger, since the evaporitic flow better developed there, than that in the eastern part. However, the structural causes of the formation of the evaporate-below layer changed obviouslyly in varied localities.