Abstract: The coordinated and coupling development of ecological civilization construction and urbanization plays an important role in promoting regional sustainable development, so it is very necessary to study the coupling coordination of ecological civilization construction and urbanization. This paper takes the 26 cities of Yangtze River Delta Urban Agglomerations as an example, and evaluation indexes of ecological civilization construction and urbanization are established. The evolution of coupling coordination degree of ecological civilization construction and urbanization in 26 cities from 2008 to 2015 are analyzed by using the method of entropy TOPSIS and coupling coordination model. The results show that: (Ⅰ) The levels of ecological civilization construction and urbanization in Yangtze River Delta Urban Agglomerations are on the rise, and the higher the level of urbanization, the higher the level of ecological civilization construction. (Ⅱ) The level of coordinated and coupling development of ecological civilization construction and urbanization in Yangtze River Delta Urban Agglomerations is on the rise, but it is still at a low level. The coupling degree and coordination degree of ecological civilization construction and urbanization in Yangtze River Delta Urban Agglomerations are all fluctuating and rising. In 2015, the coupling degree was antagonistic and the coordination degree was slightly unbalanced on the whole. (Ⅲ) The spatial difference of coupling-coordination of the ecological civilization construction and urbanization in Yangtze River Delta Urban Agglomerations is obvious. The distribution of regions with high coordination degree has changed from “three points” (Hangzhou, Nanjing and Shanghai) in 2008 to “Z type” (Nanjing-Shanghai-Hangzhou-Zhoushan) in 2015. (Ⅳ) According to the level of ecological civilization construction and urbanization, 26 cities are divided into four types and several measures of ecological civilization construction and urbanization are proposed. It is expected to provide some help to the improvement of ecological civilization construction and urbanization of cities in Yangtze River Delta Urban Agglomerations.