Structural transfer zone in northern Qiongdongnan basin is complex in structural features, the relationship between the structure and the hydrocarbon is not clear. Based on the seismic interpretation and geology research, the styles and development characteristics of structural transfer zone in northern Qiongdongnan basin are analyzed, and its significance for hydrocarbon geological is concluded with respect to reservoir, source rock, traps and migration. The research result shows that, there is convergent assemble and overlapping structural transfer zone, which can keep displacement and strain balance typically through branching secondary faults, turning faults strike and changing faults activity rate. Paleogeographic framework of the alternated source and depocenter in northern Qiongdongnan basin was developed at early rifting period, which controlled the development of high quality reservoir, hydrocarbon source rock, structural traps and hydrocarbon migration, and the paleogeographic framework made the structural transfer zone be of favorable conditions for hydrocarbon accumulation. The study shows that, the structural traps and structural-lithologic composite traps in this structural transfer zone are the favorable areas for hydrocarbon accumulation.