Abstract: Based on 3D seismic data interpretation results,two main strike-slip faults in A tectonic,south of the Liaozhong sag in the Liaodong bay depression were identified.Under the control of the diversity of its developmental characteristics,different kinds of associated tectonic were formed.Combined with the physical simulation experiment,the tectonic causes were analyzed.The results indicated the clear existence of strike-slip faults and its associated tectonic formed by the petroleum geological significance and two major strike-slip faults on both sides because of the difference of stress conditions and activity in different positions,strike-slip faults and their associated fault formed multi-stage‘Y',negative flower structure and shovel type negative flower structure three types of tectonic style,and accordingly formed strike-slip double stretch superposition structure,strike-slip master fault extensional structure and strike-slip fault in extrusion structure control three structure types,with different trap effect and hydrocarbon migration conditions.