A remarkable sedimentary differentiation arises in the horst and graben areas within the Nanhua Rift Basin during Nanhuan. Based on the detailed fieldwork on the Nanhuan sequences in the Jiangjunshan Profile, Songtao Area, East Guizhou Province, South China, a stratigraphic correlation is carried out with the Nanhuan Sequences in the graben and horst areas in the Nanhua Basin. The sedimentary differentiation is showed in the lithological and thickness changes of the Tiesiao Formation and the first Member in the Datangpo Formation. In the graben area, the Tiesiao Formation is composed of the glacial—marine diamictites and sandstone with the thickness of ~10m, the 1st Member of the Datangpo Formation is composed of 0.5 to 15 m massive Mn carbonate (rhodochrosite) interbedded with Mn bearing shale. In the horst area, the thickness of the Tiesiao Formation decreases to several meters and its lithology changes to glacial—marine diamictites and carbonates, the Mn rich deposit vanishes. LA ICP MS zircon U Pb dating results from the tuff layer at the bottom of the Datangpo Formation gives an age of 664.2±2.4 Ma which constrains of the Sturtian Glaciation ending time in the Nanhua Basin horst area. Compared with the ages from the sedimentary sequences in the garben area, we can constrain the ending time of the Sturtian Glaciation to 663~667 Ma. This result proves that the ending time of the Sturtian Glaciation in East Guizhou Province is synchronic. Meanwhile, according to the latest geochronological data collected world widely, we find that the Sturtian Glaciation in global scale is also synchronic