The compression- torsion fault system in the interior of western China basin is developed relatively well, but understanding of fault combination patterns and genetic mechanism is relativelypoor. This has become a technical bottleneck in the key exploration field shifting from basin margin to intra- basin.Based on the geometric characteristics and stress- strain state analysis of compression- torsion faults of Jurassic structural units in the central Junggar basin, it is clarified that the Yanshanian episodic fault was a direct response to the extension of the strong compression- torsion deformation in the deep basement to the shallow layers, with the genetic mechanism of torsion as the dominance and pressure as the supplement.Closely related to the “chessboard” bed form in the central Junggar basin, the Jurassic compression- torsion faults have four typical combination patterns and distribution rules of “three belts and one zone”.The two sets of different strike faults show conjugate shear relationship and form a complete or incomplete diamond geometry on the plane.According to Coulomb fracture criterion and seismic profile characteristics, it can be concluded that the sharp angle region has obvious squeezing property, while the obtuse angle region has extensional property. The drilling results and oil test results in block of the higher exploration degree prove that the sharp angle compression area is the main hydrocarbon accumulation unit with good sealing of fractured surface, and the obtuse angle extension area is the longitudinal hydrocarbon transmission area with open fractured surface. The research results have promoted the research progress in the combination pattern, genetic mechanism and reservoir controlling action of the compression- torsion fault system in the intracontinental depression of western China, which is of great enlightening significance to the next oil and gas exploration of the Jurassic in the central Junggar basin.