Abstract:The thesis has reseached on geology. petrology, geochemistry a nd chronology for Shangshu volcanic rocks that corespond to the Banxi formation in the upper proterozoic subera. It is proposed that this volcanic rocks were di vided into two group: first one is the red subaerial cakealkalic mediumhigh potossium volcanic rocks and alkaline shoshonite that were formed in middleupp er proterozoic era; second one is the green submarine lowmedium potossium thol eiitic volcanic rocks that were formed in the middlelower palaeozoic era. It is recognize that the Banxi formation represented the ancient continent from northeastern Jiangxi province must be resolved: the red subaerial volcanic rocks is a part of Jiangnan ancient continent, it corespond to Banxi formation; but th e green submarine volcanic rocks not belong to the Banxi formation and must sep arate from Jiangnan ancient continent.