On the basis of integrated logging, seismic data, and drill cores, the high-resolution sequence stratigraphy of the Dongying Formation in the Ltida area, Liaodongwan Basin, has been analyzed. Short- term, middle-term, and long-term base-level cycles have been recognized in the Dongying Formation. The depositional history is discussed under a isochronous stratigraphic frameworks, and a depositional infilling model is proposed.