Abstract:Two types of Yanshanian igneous petrotectonic assemblages in East China are recognized: most of the igneous rocks is characterized by the continental marginal arc in petrology and ge-chemistry like Andes and west USA; and the Hercyn-type biotite-, two mica-, and muscovite granite belt is developed in the Nanling region . Three segments of Yanshanian igneous rocks a-long the belt have been recognized. In terms of the magma-tectonic event sequence, the north, middle and south segments have CCW, CW,and CCW + CW pTt path, respectively. The CW pTt path of the middle segment, indicated from the basaltic magma underplating after the crustal thickening, is believed to be a cause for the dominant developing of the shoshonitic rock assemblage. This paper suggests that, the Andes-like orogenic belt resulted from the lithosphere de- lamination (loss of about 120 km continental lithosphere root) in combination with the oceanic subduction, and the Hercyn-type Nanling orogenic belt is formed due to both the lithosphere and the crust thickening. Thus, the orogenic belt of Ease China in Yanshanian is believed to be a composite orogenic belt of continental marginal and continental collision orogeny.