Abstract: It is reported that marine deep-water carbonate rock rich in hydrocarbon resources can be assigned to the transitional facies between continental slope and deep sea basin.Nevertheless,this paper argues that the example given here is an exception.Tectonic background,sedimentation,sedimento-structural feature of the deep-water carbonate rock facies of the platform fault-scarp slope are studied.An attempt to classify breccia of this facies is made and the depo-sitional models of the slope are establ ished.Assessment of its hydrocarbon potential shows bright oil and gas prospects of deep-water carbonate rock on the fault-scarp slope of early Triassic platform in the Shiwan Dashan Basin in Guangxi.