The turbidity and bottom currents are two basic flowing mechanisms in deep-water basins, and the study about interaction between them is the leading edge and weak point of present sedimentology. According to the research about the interplay of gravity and bottom currents, and the leading sedimentation mechanism in different geological periods, there are four different patterns of the interaction between the two currents. The relative sea level change, climate (glacial—interglacial) change, tectonic activity, topography and other factors control the interplay between the gravity flow and bottom current by means of affecting the relative strength of the two sedimentation mechanisms. The South China Sea has favorable geological conditions for the development of interaction between gravity flow and bottom current, and the one-way migrating canyons and sediment waves are excellent interaction geological products.