Recent discoveries on ophiolites indicate that there must have been a Paleotethyan geosuture zone bordering China and Vietnam, which separated the Vietbac Block from the Huanan Subcontinent. The Indosinian foreland fold-and-thrust belt bordering Yunnan and Guangxi supported further evidence to the Paleotethysides. This paper aims at to discuss the main features of thrust-nappe structures, and reveal some characteristics of Indosinides in the area which was reformed in the Himalayan orogenesis. The continental margin of Paleotethyan ocean there may have been a complicated one. The passive continental margin might be NEE-striking in southeast Yunnan, with some NW-striking troughs (or aulacogens) stretching into the carbonate platform; while in west Guangxi the passive one NW-stretching. In southeast Yunnan, the face to face continental collision occurred along the NEE-striking segment, and the thrusts constituted a leading imbricate fan; and dextral strike-slipping along the NW-striking faults. Two kinds of front can be distinguished: a broad and low-strained front and passive roof duplex, the latter being related to dextral strike-slipping of Wenshan Malipo fault. The manifestation of NW-striking thrusts in west Guangxi was dextrally oblique thrusting in Indosinian orogenesis. In addition to thrusts, the nappe structures well occurred in the area. The distant allochthonous rocks are composed of limestones of oceanic island, floating on the Triassic turbidites, and some of them have been involved into the foreland thrusting. The sedimento-igneous rocks deposited on passive continental margin in nappe outlier may represent a short-distance allochthon, for example, the Funing nappe-outlier. The thrusting was extended towards the north or northeast, and the overthrust accretional complex might bury most of the molasse deposits and create a false impression of few molasse occurring.