Abstract: In order to understand the floristic composition, community struction and diversity, based on investigating the plant community distribution of soil gentle slope, rock slope, estuary-type hydro-fluctuation belt. The results showed that there were 105 species of herbaceous plants belonging to 42 families and 92 genera in all plots. The dominant families were Gramineae and Compositae.The number of species increased first and deceased finally with the increasing of altitude. The species diversity index of soil gentle slope hydro-fluctuation belt and rock slope hydro-fluctuation belt showed a certain spatial and temporal heterogeneity with the elevation change, and the species diversity index of the estuary-type hydro-fluctuation belt from lake inlet to upper reaches had no significant difference. Obviously, the distribution of plant communities in the riparian zone is affected by the elevation and topography.