Abstract: This paper briefly demonstrates that the muscovite (two-mica)granite is a petrological record of intracontinental subduction. The Indosinian-Yanshan Lan (245-122M a) two-mica granites are widely distributed in the South China Continent and the Tianshui-Yajiang region, and the foreland fold-belts are developed on both side of the Yangtze Continent. Such a symmetric feature and their structural setting indicate the intracontinental subduction of Yangtze Continent beneath both the South China Continent and the Songpan-Ganzi fold belt. Based on both the total width of two-mica granite zones on both sides of the Yangtze Continertt (about 650km ),the minimum subducted width of Yangtze continent is estimated to be 650km. The present width of Yangtze continent is about 680km,therefore the Yangtze Continent and is reduced at least to about one half of its original width by the Mesozoic intracontinental subduction. Alternatively, the subducted area may be a m icro-continent situated between the Yangtze Continent and Jiangnan orogenic belt. This paper gives a criterion to recognize and distinguish the intracontinental subduction zone and the thrust tectonic zone. The tectonic boundary between the Yangtze Continent and Qinling orogenic belt is a thrust-strike slip tectonic zone rather than a intracontinental subduction zone. The Jiangnan orogenic belt and Longmenshan orogenic belt a believed to be the overriding continents, rather than to belong to the Yangtze Continent. The inner side of the Mesozoic Southeast orogenic zone is considered to belong to the Higher Himalaya-type in tracontinental subduction zone rather than to the Yarlu Zangbo-(Tsangpo-)type or the Hsu’s (1987) collision orogenic zona-type. The intracontinental subduction is believed to be the main mechanism for the formation of the South China Continent, which underwent both of the Neoproterozoic and the Caledonian intracontinental subduction events resembling the YarluZangbo-type or the Hsu’s (1987) collision orogenic zone type. Both the multiple intracontinental subduction and formation of muscovite granites with consequent concentration of the metallic elements of continental crust affinity may be a favouruble dynamic background for the formation of the large and superlarge W –Sn-Sb-N b-Ta-REE-U ore deposits in the South China Continent