The potential remaining resources are bigger in the Rongxingtun area, Eastern sag, Liaohe Depression, it needs to carry on the research for the main reservoir types and distribution characteristics in order to promote the further exploration in this area. Using seismic, drilling and well logging and testing data, by making the planar and vertical profile maps for the existing reservoir distribution, the main types, distribution characteristics and potential reservoir targets were summarized in this paper. It revealed that the reservoir types are the structural reservoirs and complex reservoirs which is related to faults, it tend to distribute mainly as the dotted and belt shape in the planar distribution, and closely related to the various faults and their associated structures, the south and west part more richer than the north and east part for their accumulation degree. Moreover, it is large difference in vertical hydrocarbon accumulation, the main sections of hydrocarbon distribution are the third section of the Dongying formation, first section of Shahejie formation and second section of Dongying formation separately, the most complex fracture system and the different types of assemblages has exerted important influence on the vertical distribution of oil and gas, make them vertically superimposed with each other. Finally, it demonstrated that Rongxingtun slope belt is favorable potential target zone, the basic target types are the structural and complex traps reservoirs related to faults.