Based on the unconformity and rock association and the plan that "Group" corresponds to the volcanic cycles or sedimentary cycles, the late Mesozoic volcano - sedimentary rock series in Jiangxi province and northern Guangdong Province can be subdivided into the Yutian Group, Wuyi Group, Banshi Group or Luotang Group, Huobashan Group and Guifeng Group. According to the lithology and lithofacies and the plan that "Formation" corresponds to the complex lithofacies or sedimentary lithofacies, the Yutian Group can be subdivided into the Shuitoujing Formation and Changpu Formation; the Wuyi Group into Shuangfengling Formation, Ehuling Formation and Shixi Formation; the Banshi Group into Heshui Formation and Yousheng Formation; the Luotang Group into the Baibu Formation, Zhoutian Formation and Dengjia Formation; the Huobashan Group into the Qiujia Formation, Tiantaishan Formation, Lengshuiwu Formation and Zhoujiadian Formation; and the Guifeng Group into the Hekou Formation and Tangbian Formation and Lianhe Formation. Fossil data and isotopic ages show that the Yutian Group belongs to the Middle Jurassic, the Wuyi Group to Late Jurassic- early Early Cretaceous, Luotang Group and Banshi Group to late Early Cretaceous-early Late Cretaceous, Guifeng Group to late Late Cretaceous.