Abstract: Songliao Basin is the main petroleum basin in my country.The analysis of sedimentary facies and the study of the characteristics of sedimentary evolution in this area is an important basis for oil and gas exploration.Guided by highresolution sequence stratigraphy.Select the representative Honggang South area in the basin for research.Combining features such as the color of stratum core and bedding structure.Take technical measures as taking typical singlewell facies research as the point.the typical continuous well profile is line and comprehensive research to analyze the developmental characteristics of strata and regional sedimentary background of quantou qinshankou and yaojia Formation in Honggangnan.And further proposed and analyzed the sedimentary evolution characteristics of the area.Provide reference materials for the next stage of deeplevel oilfield geological development.

Key words: petroleum basin,sedimentary facies,sedimentary evolution