Poyang Lake is an internationally important wetland, the largest migratory bird habitat in Asia, and the largest freshwater lake in China. Its ecological environment has a wide range of international attention and influence. The dish-shaped lake is a seasonal sub-lake exposed on the beach during the dry season of Poyang Lake. Its special hydrological and geomorphic characteristics provide a good habitat for more than 80% of the lake’s wintering migratory birds. On the other hand, the widely distributed dish-shaped lakes with varying heights effectively alleviated the impact of drought and flood disasters on the Poyang Lake wetland ecosystem, and is of great significance to maintaining the stability of the Poyang Lake basin ecosystem and biodiversity. Compared with the breadth and depth of research on the water ecosystem of the main lake area of Poyang Lake, the dish-shaped lake has received less attention. This study takes Poyang Lake's dish-shaped lake as the research object, based on long time series remote sensing data, it analyzes the water area, water-sediment, and the spatio-temporal dynamic characteristics of vegetation from different time scales (month, quarter, and year); combined with nature and social economy Data analysis of the driving factors of its changes. On this basis, the ecological effects brought by the dynamic changes of the dish-shaped lake water area were discussed from the aspects of migratory bird habitat changes and agricultural production, in order to lay a foundation for the protection of wintering migratory birds and their habitats in the region, and to maintain the Poyang Lake ecosystem Provide guidance on safety and biodiversity.