In order to study the soil salinization along the river and seacoast in the Yangtze River estuary in autumn after the Three-Gorge Reservoir impounded water for two years, soil samples were collected there and soil salt composition tested. With the aid of a statistic software, principal component analysis was conducted of types and characters of the saline soils therein, and cluster analysis of the soil salt profile types. Results show that in the two years after the Three-Gorge Reservoir began to impounded water the main type of soil in the Yangtze River estuary in autumn is saline fluvoaquic soil, of which the cation composition is dominated with Na⁺, whereas the anion composition with SO₄ ^2- which is a little more than Cl^-. Salt accumulation occurs mainly in the upper layers of the soil profiles and displays both shortterm peaks and a longterm accumulating trend. The aggravation of soil salinization was mainly caused because of the dry year. The extent of impacts of the Three-Gorge Reservoir needed further study. On such a basis, the author calls for sitespecific rational irrigation/drainage practices and measures to ameliorate Na⁺ type saline soil.