Urbanization and the ecological environment influence and promote each other, and the coupling and coordination between the two systems is of great significance to regional green sustainable development. Based on the 2005-2019 data of Shaanxi Province as an example, this study combines the coupling coordination degree model, the relative development model and the Panel Vector Autoregression(PVAR) model on the basis of constructing a new urbanization and ecological environment system evaluation index system to analyze the temporal and spatial laws of coupling coordination between the new urbanization system and the ecological environmental system and interaction. The results show that:(1) the degree of coupling coordination in Shaanxi Province generally presents an evolutionary law of "basic incoordination-basic coordination-moderate coordination". (2) The spatial difference of the coupled and coordinated development status of each city is obvious. In 2005, 2013, and 2019, there were big differences in the coordinated development status of new urbanization and ecological environment coupling in 10 cities of Shaanxi Province, and the relative development status was generally changed from the new urbanization. The lagging state has developed into a lagging state of the ecological environment. (3) The impulse response diagram reflects the obviously interactive relationship between the new urbanization and the ecological environment. The ecological environment was negatively restrained by the impact of the new urbanization in the early stage, and the impact gradually decreased in the later period, and the impact was greater by itself, while the development of the new urbanization in the early and late stages was mainly affected by itself. This study indicates that the development of new-type urbanization must give priority to ecology. On the basis of improving ecological carrying capacity, the urbanization development level of different dimensions such as spatial population of various regions in Shaanxi province should be accelerated, so as to achieve the goal of high-quality sustainable green development.