Abstract: To further investigate the temporal-spatial characteristics of tides at the Changjiang River Estuary, particularly the amplitude variation patterns of astronomical and shallow-water tidal constituents, this paper applied harmonic analysis and autocorrelation function methods to analyze the continuous tidal level data in 2010~2019 from 8 stations, including Lianxinggang and Xuliujing stations, etc. The results indicated that the M2 tidal constituent had the largest amplitude in all stations, and the Lianxinggang Station had the largest average amplitude, which was 1.357 m. The S2 tidal constituent amplitude was the second largest, with a spatial distribution similar to the M2 tidal constituent, gradually decreasing from the estuary to the upstream. There were differences in the tidal period characteristics of each constituent at various stations. In terms of amplitude variation trends, the amplitudes of the M2 and S2 tidal constituents increased significantly in all stations, while those of the MS4 and M4 tidal constituents showed a decreasing trend. The amplitude of the K1 constituent showed a slight increase, the O1 constituent declined in most stations, and the M6 constituent showed varying trends at different stations. The temporal-spatial characteristics of tidal constituents′ amplitudes at various stations in the Changjiang River Estuary show significant differences, revealing the regionality and complexity of tidal variations at the estuary.