Abstract: Hala抋late mountain area is a part of the piedmont thrust belt in northwestern margin of Junggar basin. The progress of oil and gas exploration in this area is seriously affected for its unclear tectonic process. Based on the 3D seismic data interpretation, field geologic survey and core geochemical analysis, the vertical tectonic evolution process in this area is reconstructed, and the controlling effect on the oil?gas accumulation is discussed. The results show that the tectonic evolution in Hala’alate area mainly went through such six stages as ancient oceanic crust subduction and collision (C2), expanding?rifted and early thrust?deformation (P1), strong thrust and nappe (P2), thrust and superimposition (T), oscilation and upswelling (J-K) and upswelling?erosion and strike?slip adjustment (Cz) ones. In the late Early Permian,under the stretched and rifted tectonic setting, thick source rocks are developed in this area; from Late Permian to Triassic, the strong thrust and nappe allow the reservoir petrophysical property to be improved, thus forming numerous structural traps; since Jurassic, the tectonic activity tends to rest, which plays a good conservation role in early forming reservoirs