Abstract: The dynamics of total suspended solids (TSS) in Xiangxi Bay of Three Gorges Rese rvoir (TGR) during the period of spring algal bloom were weekly investigated. Th e results showed that the TSS in the Bay ranged from 066 to 13492 mg ·L-1, with a median of 680 mg·L-1, and tended to be increased fr om headwater to down-lake zones. The spatial pattern of non-volatile suspended solids (NVSS) was similar to that of TSS, while volatile suspended solids (VSS) showed obviously different pattern from TSS and followed the spatial pattern of chlorophyll a. Regression analysis indicated that in the mid-zone of the Bay, chlorophyll a was significantly related to TSS and VSS, and explained 667% 〖KG-*2〗-〖KG-*7〗967% and 589%〖KG-*2〗-〖KG-*7〗855% of the variance in TSS and VSS, respectively. In the headwater and down-lake zones, there were no significant relationships between chlorophyll a and TSS (including NVSS and VSS ). The TSS in mid-lake had more close relationship with VSS than with NVSS, while that in headwater and down-lake had more close relationsh ip with NVSS than with VSS, implying that the mid-lake of Xiangxi Bay was a mor e autochthonous system than the headwater and down-lake where allochthonous inf luences were the more determinant factors.