Songliao basin that is rich in oil, natural gas, coal and uranium resource is a Meso-Cenozoic continental sedimentary basin in Northeast China. The relationships between sandstone type uranium deposits and sedimentary strata in South Songliao Basin have been reported by many previous literatures, while the regional distribution characteristics of these sedimentary strata have not been well understood. This study established the framework of the isochronous strata for South Songliao Basin based on the core logging data collection and analysis, field outcrop investigation, and paleontology data analysis with the help of multi-well stratigraphic cross section profile establishment and analysis technology. An overlap has been found for Upper Cretaceous strata from Quantou and Qingshankou Formations in the east to Yaojia and Nenjiang Formations in the west, which indicates that the center of deposition once migrated from east to west in sedimentary history. The regional sedimentary strata of Nenjiang Formation are stable and thick, while those of Yaojia formation are stable and thin. Regional sedimentary strata of Qingshankou and Quantou Formation are unstable and overlapped from east to west. The strikes of the Upper Cretaceous strata are in NE direction and consistent with the distribution direction of Songliao Basin. <摘要译文>