Based on the rich connotation of the efficiency of digital economy and ecological economy, this paper took the three major urban agglomerations of Beijing-Tianjin-Hebei, Yangtze River Delta and Pearl River Delta as the research objects, comprehensively applying entropy weight-TOPSIS method, Super-SBM model and coupling coordination model, systematically analyzing the spatial-temporal evolution characteristics of the coupling coordination degree of digital economy and ecological economy efficiency from 2011 to 2021. The influencing factors were discussed with panel Tobit model. The results showed that: (1) The coupling coordination degree of digital economy and ecological economy efficiency in the three major urban agglomerations showed a good trend of continuous growth, and the average coordination degree was ranked from high to low as follows: Pearl River Delta > Yangtze River Delta > Beijing-Tianjin-Hebei, among which the Beijing-Tianjin-Hebei urban agglomeration had always been centered on Beijing, giving full play to the radiation role of “one core” . The Yangtze River Delta urban agglomeration showed the characteristics of “high value as the center, continuous development” , while the Pearl River Delta

urban agglomeration showed the trend of “high in the middle and low at both ends” . (2) The level of economic development and financial development had a significant positive promoting effect on the coupling coordination degree of the three major urban agglomerations, while the influence of the degree of opening to the outside world, the degree of government intervention, the level of science and technology and the level of industrial structure on the coupling and coordination development of urban agglomerations had obvious regional differences.