Based on a study of the vertical sedimentary sequence, the assemblage of vertical lithology, geochemical analyses of mudstone samples, and logging characteristics, the authors recognized such sequence stratigraphy interfaces as regional unconformity, regional tectonic regime interface, sedimentary system interface and transgression surface. The Benxi-Taiyuan Formation was formed in an epicontinental sea that had subdued floor, so most of the sequence structures in Benxi-Taiyuan Formation are of dual system character. Tectonic disturbance, sea level change and differential compaction provided enough accommodation space for the distribution of K1 sandstone and Qiaotou sandstone. The framework and model of sequence stratigraphy in Benxi-Taiyuan Formation within eastern Ordos basin are established in this paper, which contains typeⅠmodel of ramp marginal basin and typeⅡof ramp in an epicontinental sea background.