Abstract: Geomorphological characters of buried paleo-channel systems in the western South Yellow Sea are studied in this paper, based on the interpretation of high resolution seismic profiles. It is found that there are two complex dendritic drainage systems developed during the Last Glacial Maximum (LGM) on the continent shelf of the South Yellow Sea, shallowly buried several to tens of meters below the sea floor. Main paleo-channels are getting wider and deeper towards the sea. Excluding the U and V-shaped channels which are common in other areas, there are other types, such as W-shaped, boxlike (approximate rectangle) and inverse trapezoid channels. And compound, double (or multilayer) and asymmetry types are also common, indicating a complex paleo-channel system in LGM.