Abstract: By using the core, drilling, logging and seismic data,the strata of Qing 1 member in Yaoyingtai area, the stratigraphic sequence were divided into sequences, the isochronous stratigraphic framework with high accuracy quasi-sequence was established. and the Qing 1 member was divided into a tertiary sequence. According to the lithology of the stratum and the variation characteristics of the logging curve in vertical direction, five quasistratigraphic sequences(sand groups) were divided internally, and two kinds of quasi-stratigraphic sequences(progradation and retrogradation) were developed. In this paper, the composition, evolution and distribution of sedimentary facies in Qing 1 member are analyzed by taking the high precision quasi-sequence(sand group) as the research unit.