On the basis of regional geologic survey that the authors have carried out for a long time in Jiangxi Province, this paper puts emphasis on the investigation of lithostratigraphic sequence and the subdivision and correlation of ages of the epimetamorphic strata of Meso-Neoproterozoic folded basement before Sinian as well as three suites of complex strata. The results show that the differences of the stratigraphic lithology between Jiangnan continental margin, South China oceanic basin and metamorphic basement of Huaiyu island arc is apparent, suggesting that the age of the former may be later than that of the latter.