This research used the flume experiment to explore the influence of large woody debris (LWD) on river morphology. The results indicated that the LWD deposited on the channel could effectively block or separate the flow, and even accelerate the frequency of vibration of main channel so that the channel could become abundant. Because the LWD could lower the flow velocity, the scour depth of riverbed would decrease and the sediment transport would reduce as well as the sediment could be deposited effectively in the downstream of LWD. In regards to the deposition patterns, the percentage of LWD parallel to the flow (42%) was the highest, following the percentage of LWD oblique to the flow (32%) and the percentage of LWD perpendicular to the flow (26%). The transport velocity of LWD is inversely proportional with the LWD length. In addition, the accumulative and stable LWD could effectively deposit the sediment and lower the movement velocity of LWD.