Through interpreting the 3D seismic data and by combining the results with plane mapping，the deformation characteristics of structural transfer zone of LD21 Oilfield and LD16 Oilfield in the south subsag of Liaozhong Sag were discussed，and the relationship between the structural transfer zone and hydrocarbon accumulation was analyzed as well. The results show that Tan-Lu fault zone runs through the south subsag of Liaozhong Sag，in which restraining S-shaped structural transfer zone of LD21 Oilfield，restraining S-shaped structural transfer zone of the north of LD16 Oilfield and releasing S-shaped structural transfer zone of the south of LD16 Oilfield are formed in partially curved sections of central strike-slip fault，Fault LD16-3 and Fault LD16-21，respectively. Releasing intersecting structural transfer zone of the middle of LD16 Oilfield is formed in intersecting area of Fault LD16-3 and Fault LD16-21. The structural transfer zone changes the stresses transmitted by the segmental faults，so that the three-dimensional spatial strain is conserved. The fault displacementdistance method is used to investigate the deformation characteristics of the intersecting structural transfer zone of the middle of LD16 Oilfield. The control of structural transfer zone on hydrocarbon accumulation is mainly as follows：controlling the formation of structural traps，the development of high-quality reservoir，the hydrocarbon migration，and the fault blocking. Restraining structural transfer zone is a favorable field for oil and gas exploration in the south subsag of Liaozhong Sag.