This paper depicts in detail the Cambrian profile in east Liaoning peninsula, divides it into eight stratum units upwards including Jianchang, Mantou, Maozhuang, Xuzhuang, Zhangxia, Gushan, Changshan and Fengshan formations, and compares them, thus unifying the lithological sequence, paleontological sequence and stratigraphic sequence. The paleographic spreading and sedimentary evolution of stratigraphic sequences can be well studied based on the lithology of sedimentary rocks and fossil distribution, providing a useful tool in recuperating the climatic and environmental changes in Liaoning peninsula.