Abstract: There are many granite bodies and bimodal volcanic-sedimentary basins near the Pacific coast in Zhejiang and Fujian Provinces. The Rb-Sr isochron ages of the A-type granites and bimodal volcanic rocks range from 90 to 110 Ma. Therefore, it is commonly thought that the Southeast China Continent broke up during late Yanshanian period (Cretaceous). However, there also widely exist bimodal volcanic-sedimentary basins and A-type granite bodies in south Jiangxi Province. These bimodal rocks are regionally similar to those observed in northeast Guangdong and southwest Fuiian Provinces. They generally form an EW trending bimodal volcanic rock belt, extending for more than 200 km. The Rb-Sr isotopic dating on the bimodal volcanic rocks and A-type granites show that the Rh-Sr isochron ages of basalts range from l73Ma to l79Ma, rhyolites and A-type granites ale l65M a and l76Ma respectively. It is suggested that the rifting took place twice dating the Mesozoic era in Southeast China Continent and the earliest rifting occurred in the early Yanshanian period(Jurassic).