The Sinian system in the Upper-Yangtze Region contains the Doushantuo Formation and the Dengying Formation, the former includes more black shales and the later is marked by a set of dolomites. From litho-facies succession to meter-scale cycle and from sedimentary facies succession to third-order sequence, the Sinian system in the shallow-water setting can be divided into five third-order sequences that can be grouped into one second-order sequence. According to two types of facies-changing surfaces and two types of diachronisms in the stratigraphic records, sequence stratigraphic divisions at each main logging section become the basis to establish the sequence-stratigraphic framework of Sinian system in the study area. This sequence-stratigraphic framework indicates several features: The Doushantuo Formation with more deep-water black shales represents a transgression process after the great glaciation period. Different from the changing feature in the Cambrian, the dolomites of the Dengying Formation with well-preserved primary sedimentary fabrics are also characterized by a set of dolomites in the deeper depositional background. This changing feature may reflect a particular dolomitization in the Sinian and a problem that need further researched in the future. The Sinian stratigraphic succession from the Doushantuo Formation to the Dengying Formation, both makes up of a larger-scale upward-shoaling succession of sedimentary-facies and demonstrates a growth process of ramp carbonate-platform that is the response to the third and the second-order sea-level changes. This process is clearly illustrated in a series of the panel sequence-stratigraphic framework diagrams and the corresponding palaeogeographical maps.