Abstract：The geotectonic nature of the South China has been debated for a long time between the Old Land or craton and the Folded Geosyncline or orogenic belt. The authors insist on that it is an orogenic rather than a cratonic area, because South China is rare of Early Precambrian terrains, widespread of huge volume of geosyncline-facies sediments with age of <1.0 Ga, significantly affected by multi-cyclic tectonic movements after 1.0 Ga, and developed with multistage Phanerozoic granitoids. Considering that famous platforms or Old Lands in the world do not contain tungsten deposit, and that South China is the most important tungsten metallogenic province in the world, in this paper the authors introduce the geochemical principles in W mineralizing processes, the geochemical characteristics and genetic tectonic setting of W-bearing granitoids in South China; and thereby, through study of regional mineralization, confirm that the South China is tectonically an orogenic belt.