College of Earth Sciences，Jilin University，Changchun 130061，China

 Taking the western slope area of Songliao Basin as the study area，combined with field outcrop and drilling and logging data，the sedimentary characteristics of Taobao － Ping ＇anzhen region were studied． The sequence stratigraphy of Well Hai 36 was analyzed，with three unconformities，namely SB1，SB2 and SB3 identified from bottom to top，and the single-well sedimentary facies identification was undertaken． Based on the single-well sedimentary facies analysis，the distribution model of sedimentary facies was subsequently established and the sedimentary systems of western slope area were mapped． The results show that: ①Delta and lacustrine sedimentary systems are mainly developed in the western slope area; ②The main provenance of Qingshankou Formation deposition in Taobao － Ping＇anzhen region is the Baicheng － Yingtai that locates to the west of the study area and the secondary provenance is Nehe that locates to the northeast of the study area．