Abstract：The Late Cretaceous lithofacies palaeogeography in southern Tibet is preliminarily studied and reconstructed through the synthetical analyses of the Upper Cretaceous sedimentary characters and its facies.The results indicate that the seawater gradually became deep，and the lithofacies belts of the littoral zone，the neritic shelf(outershelf and innershelf)，the continental slope and the abyssal basin stretched from south to north in this region，meanwhile，the reef and shoal facies of carbonate and isolate platform facies were developed above the neritic shelf facies in some local areas.Generally the basin was still of a passive continental margin，but an embryonic form of peripheral foreland basin already existed.
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