This paper briefly reviewed those previous studies of the Tuchengzi Formation in Yinshan-Yanshan. Furthermore, on the basis of geological survey, the paper focuses on the stratigraphy, sedimentary facies, provenances and paleocurrents of the Tuchengzi Formation. This research suggests that the Tuchengzi Formation is the sediments of rift basin and deposited in an extensional tectonic background of the Late Jurassic-Early Cretaceous. A dynamic model of the evolution of basins of Tuchengzi Formation was proposed finally.