The Shexian Group and the Yulingguan Group are important Precambrian stratigraphic units in the northeastern part of the Jiangnan orogenic belt. Zircon dating ages of tuff bedding from the Changqian Formation (852±6 Ma, 840±11 Ma) and the Jingtan Formation (809±10 Ma) in south Anhui Province are reported in this paper, which constrain the ages of the Shexian and Yulingguan Groups, adding some reliable age basis to the correlation of the Neoproterozoic strata in southern Anhui Province. Integrating a large number of high precision dating data obtained from the Jiangnan orogenic belt in recent years, the authors have reached the conclusion that the Shexian Group is equivalent to the Fanjingshan Group, the Sibao Group, the Lengjiaxi Group, the Shuangqiaoshan Group, and the Xikou Group. And the Yulingguan Group, overlying the Shexian Group, is equivalent to the Xiajiang Group, the Danzhou Group, the Banxi Group, the Majianqiao Formation, the Dengshan Group, and the Shangshu Formation.