There are relatively few sedimentological studies on the Cryogenian in the northwestern Yangtze Craton, especially in the Chengkou area of the Dabashan Mountain. Whether the Cryogenian Muzuo/Mingyue and Daianhe formations have glacial sedimentary characteristics is also uncertain due to lack of detailed sedimentological investigation, which limits the understanding of sedimentary evolution process of the Cryogenian in the Yangtze Craton. These lacunae are not conducive to the determination of the sedimentary stratigraphic framework and regional correlation of the Cryogenian. In this paper, four typical Cryogenian sections in the Chengkou area are selected for undertaking a detailed stratigraphic and sedimentological study, and the glacial sedimentary marks such as the gravels with glacial striae, dropstones, and subglacial soft sedimentary deformations are identified to prove the glacial genesis of the Daianhe and Muzuo/Mingyue formations. The facies of continental, periglacial and marine glacial are also discerned. On this basis, according to the rock assemblages, sedimentary characteristics, structure of stratigraphic succession, geochemical indices (such as chemical index of alteration) and detrital zircon U- Pb age, the Daianhe Formation is divided into two members. The 1st Member is correlated with the Gucheng Formation, the 2nd Member is correlated with the Datangpo Formation, and the Muzuo/Mingyue Formation is correlated with the Nantuo Formation. Further, through regional correlation, the stratigraphic framework of the Cryogenian in the northwestern Yangtze Craton is re- evaluated, and correlated with that in the adjacent Shennongjia area and southeastern Yangtze Craton. The sedimentary co- evolution process of the Cryogenian in the Chengkou- Shennongjia areas is as follows: during the Stuartian glacial period, the glacial transgressive- regressive cycle from the glaciomarine to the land and then to the glaciomarine developed; subsequently extensive transgression of the interglacial period formed a lagoon environment represented by carbonaceous silty mudstone. With the global temperature falling again, the Marinoan glacial period was triggered, which was reflected in the multiple glacial dynamic evolution from the glaciomarine ice- proximal to the ice- distal environment, and accompanied by the opening of the ice sheet and finally to the end of the Cryogenian. This study has determined the correlation and subdivision of the Cryogenian in the northwestern Yangtze Craton, providing new basic data and important basis for the correlation of the Cryogenian in the Yangtze Craton.