Using the basic theory of fluvial sedimentology and taking the outcrop of modern deposits of the Nenjiang River at Damagang, Fuyu County, Heilongjiang, as an example, this paper deals with the characteristics of the modern deposits in the lower reaches of the Nenjiang River. It is based on data from outcrop exploratory trenches, pits and drill holes, as well as various microscopic analyses and tests in lab. The study suggests that there be two types of fluvial deposits in this region. The bottom consists of braided river deposits dominated by a more than 5 m thick gravel layer which may be traced laterally as long as a few hundred meters. The top consists of low-energy meandering river point bar deposits dominated by intermediately fine and silty sands. There is no obvious scoured surface on the bottom. Low-angle trough-like cross-bedding, synsedimentary deforma-tional bedding and wavy cross-bedding are well developed in the point bar. Upwards the deposits pass into alternating thin beds of levee silty muds and silts and flood-plain silty muds. As a whole, the sedimentary characteristics of the Damagang deposits are low-energy meandering river deposits developed on the flood plain of a braided river. This study provides a new case for identification of complicated palaeofluvial formation.