Progress has been made in the long-term study on the Precambrian tectonic framework in South China. Through an integrated analysis of the tectonics and Precambrian formations the following conclusions are drawn.:(1) Cathaysia was a dismembered old land in the Paleoproterozoic. (2) The western Zhejiang-northeastern Jiangxi area was the active continent margin of Cathaysia in the late Mesoproterozoic. (3) The Wuling orogeny was the most important orogeny,during which the Jiangnan block collided with Cathaysia along the northeastern Jiangxi fault zone and as a result the united "Huanan (South China) old land" came into being. (4) In the Neoproterozoic, there existed evident differences in the tectonic evolution of different blocks after their collision because of respective distinctive geological conditions,and the tectonic framework in the area consisted mainly of the early Neoproterozoic Huanan continental collision zone and the southwestern Fujian-southern Jiangxi aulacogen.