Coral fossils were first found at the north slope of the Guoganjianian Mountain in the Qiangtang Central Uplift in the north Tibet(Xizang). The coral fossils were identified to be 8 genus and 10 species, including Distichophyllia norica (Frech), Gablonzeria irregularis Deng & Zhang, Margarophyllia stylophylloides (Vinassa de Regny ), M. zogangensis Deng & Zhang, Margarophyllia? sp., Montlivaltia tenuise Deng & Zhang, Pamiroseris rectilamellosa (Winkler), Paradistichophyllum verticalis Deng & Zhang, Paradistichophyllum? sp., Stylophyllopsis mosjvari Frech. The limestone yielding the coral fossils was previously thought to be the Palaeozoic by the lithostratigraphic correlation , and was treated as exotic blocks jumbling in the Late Triassic Wanghuling Formation clasolite. However, the coral fossils indicated the limestone was rather the Late Triassic than the Palaeozoic in age, therefore, the late Triassic sediments in the Guoganjianian Mountain area comprised not only the Wanghuling Formation clasolite but also the interbedded limestone among the Wanghuling Formation clasolite. it doesn’t exsit the tectonic phenomenon that the Palaeozoic limestone was jumbled in the Late Triassic clastic sediments. The Qiangtang Central Uplift was thought to have been uplifted and seperated the Qiangtang Basin into the North and the South Qiangtang Depressions during the Late Triassic before, however the newly discovered coral fossils, together with the radiolaria and coral biostratigraphic data in the Caima’er Co area reported by others, displayed the existence of the Late Triassic marine depositions in the Qiangtang Central Uplift, and further indicated that the Qiangtang Central Uplift was rather marine sedimentary area rather than terrestrial erosion area during the Late Triassic. Thus it is necessary to reconsider the previously established “One Uplift and Two Depressions ”tectonic understanding and the palaegraphic restorations of the Qiangtang Basin during the Late Triassic.