In order to further study the water and sediment effects and their causes in the watershed，measured sediment data in the watershed were collected.Hydrological statistics，univariate linear regression，Mann Whitney test，and MWP test were used to conduct in -depth research on the annual distribution，interannual variation and evolution trend，variation year，and spatial distribution characteristics of sediment in the watershed.The results indicate that the distribution of sediment is extremely uneven throughout the year，with the degree of uniformity gradually decreasing from upstream to downstream；The interannual variation is significant，and the intensity of the change gradually increases from upstream to downstream；The trend of sediment changes in the upper reaches of the basin shows a slight increase，while the interannual variation of sediment in the middle and lower reaches corresponds to a significant decrease；The sediment transport in the middle and lower reaches of the basin showed variation in 1993，while the sediment transport in the upper reaches showed variation in 1974；The sediment transport in the middle reaches is large，followed by the downstream，and the upstream is the smallest.Human activities have a significant impact on sediment transport.