Abstract: On the basis of the correlation of conodont, brachiopod and coral fossils contained in EarlyCarboniferous strata of platform facies in Duoshan and basinal facies in Muhua, Guizhou, the au-thor holds that the Devonian-Carboniferous boundary should be placed at the base of the GedaoheFormation. The main grounds are as follows: （1） the conodonts Bispathodus aculeatus and B. an-teposicornis in the Zhewang Formation first appear in the terminal Late Devonian WocklumeiaZone; （2） the stromatoporoids Pseudolebechia cumpacta, Stromatocerium eximium and Actinostro-ma contortum occurring in the Zhewang Formation are very similar to those from the Etroeungti-am （Late Devonian） bed of Western Europe; （3） the brachiopods, corals and conodonts in theGelaohe Formation have a close phylogenetic relation with some taxa in the Tangbagou Formationbut are notably different from those in the underlying Zhewang Formation. Therefore, the authorsuggests that the Devonian-Carboniferous boundary should be placed at the base of theCystophrentis -Compsite-Shuchertella Zone.