Abstract: Based on the distance coordination model, the Tapio decoupling model and the geographically weighted regression model, a systematic analysis of the interaction between urbanization and the ecological environment and its influencing factors at the national level was carried out. The results showed that, from 2008 to 2018, the level of urbanization had obvious spatial differences, areas with high levels of urbanization were distributed in “dots” and “clusters”, and the change of urbanization level was relatively stable in the short term. The spatial pattern of the ecological environment quality presented the characteristics of overall stability and partial improvement. The coordinated development degree of urbanization and the ecological environment was generally on the rise, basically at a barely coordinated level, and the gap in the level of coordination among regions had narrowed. The spatial agglomeration characteristics of coordination development degree were obvious, the distribution of high value areas was relatively scattered, and the gap of decoupling index among regions had narrowed. Science and technology investment intensity and urbanization rate had a great impact on the ecological environment, and they were positively correlated with the overall situation. The Pearl River Delta urban agglomeration had the highest degree of coordination between urbanization and ecological environment. The coordination development level of the central Guizhou urban agglomeration needed to be improved. The urbanization development and ecological environment protection of the central-southern Liaoning and Harbin-Changchun urban agglomerations were relatively slow.

Key words: urbanization, ecological environment, interaction relationship, influencing factors, urban agglomeration, multiscale