Reservoir developed well in the third member of Eogene Shahejie Formation with various kind of sandbodies.Since the evolution history and distribution diversity of sedimentary system are not fully understood，exploration of lithologic reservoir and structural-lithologic reservoir are greatly restricted in west Shuangfeng area and east Jiangjiadian area.Based on well data and seismic data，the palaeo geomorphology，palaeo shoreline，and synsedimentary faults were analyzed systematically，and the palaeo-depositional setting of the third member of Shahejie Formation in the area was restored，also the filling diversity of sedimentary system and control factors were clarified，and finally two kinds of depositional models were established. In the south part，sedimentation was controlled by the relationship between provenance direction and depression faults，and the fault activity also played its role. In the west part，Shuangfeng delta intersected with dispersed end of Xiakou fault，which makes progradation toward the lake；weak fault activity and gentle slope resulted in stable delta through long distance progradation，while sandbodies of braided river developed in delta plain subfacies greatly with low ratio of sandstone to clay. In the east part，Jiangjiadian delta and Wawu delta intersected uprightly with Xiakou fault，which makes progradation toward the lake；intense and long-term fault activity and steep slope resulted in synsedimentary faulted delta through short distance progradation，while sandbodies were transported rapidly into the lake and piled up quickly to develop mouth bars with high ratio of sandstone to clay.