Abstract: The exploration and development practices in the Cretaceous Bashijiqike formation of the Kelasu tectonic belt in Kuqa depression reveal that the fractures are featured with vertical zonation, which are possibly constrained by neutral surfaces of anticlines. It is necessary to rebuild the structural style of the Kelasu tectonic belt because the present model for structural style classification cann’t explain the vertical zonation of fractures. Selecting the Keshen section of the Kelasu tectonic belt as the study area, taking the interlimb angle of fold as the main element and combining with the fault combination configuration, the paper rebuilds the subsalt structure styles of the Keshen section in the Kelasu tectonic belt on the basis of 3D seismic interpretation. The results show that the structural styles of the Keshen section can be divided into 2 types such as gentle fold and open fold according to the interlimb angle of fold; according to the fault combination configuration, the gentle fold is further divided into double-thrust gentle fold, back-thrust gentle fold and recoil gentle fold, and the open fold is divided into double-thrust and back-thrust open folds. The structures to the north of the Keshen fault are imbricate fault anticlines made up of open and gentle folds, and the structures to the south of the Keshen fault are imbricate structures of gentle-fold faulted anticline. The distribution of fractures is closely related to the interlimb angle, the thickness and the distribution range of tension fissure zones in the open folds are much larger than those in the gentle folds, and faults has an influence on the distribution of the fractures around them. The classification of the structural style provides a foundation for the further study on the fracture development and genetic mechanism of different structural styles