Abstract: Based on the analysis of regional geological setting, integrated with data from field outcrop, drilling and seismic interpretation, the new structural style in the center of Mangya depression was established as follows: in the Early Cenozoic, the structural style in Mangya depression is dominated by compressional, imbricated and obduction modes and fewer strike-slip adjustment, forming deep basement-involved faults, compressional thrust fault blocks and compressional folds; in the Late Cenozoic, the style in it is dominated by strike-slip adjustment and fewer compressional and obduction modes, shaping shallow detachment fault-fold assemblage, and then finalizing the styles. Based on analyses of the structural styles in geometry and kinematics, the transition of tectonic stress field and the deformation mechanism of structural zones of the Cenozoic in the centre of Mangya depression are elaborated, reconstructing the history of structural evolution in this area. Finally, according to the distribution of structural fractures, it is pointed out that the concentrated areas of tensile stress in two tectonic cycles are favorable to the development or formation of fractured reservoirs, and should be regarded as the target zones for petroleumexploration in the future