Exploring the mechanism between urbanization intensity and ecological resilience at city scale and grid scale is of great significance to improve the level of ecological resilience, improve the quality of urban development, and promote the sustainable development of urban agglomeration. This paper takes the Beijing-Tianjin-Hebei as the study area, and tries to build a complete index system of urbanization intensity and ecological resilience based on land use data, population density data and socioeconomic data from 2000 to 2020. The landscape security model is used to modify the "scale-density-form" ecological resilience method, and the spatial and temporal differentiation patterns and co-evolution characteristics between the urban scale and grid scale are explored by combining the coupling coordination degree model and Tapio decoupling model. The results show that:(1) at different scales, the overall trend of urbanization intensity and ecological resilience was opposite and the dislocation relationship was obvious. Beijing and Tianjin had high urbanization intensity but low ecological resilience. At the grid scale, the distribution shapes of urbanization intensity and ecological resilience were different:urbanization intensity mostly presented a center-periphery spatial distribution, and the ecological resilience was characterized by diversification and fragmentation. (2) At different scales, the coupling coordination degree of urbanization intensity and ecological resilience increased year by year, with the highest in Beijing and Tianjin, followed by Langfang, Shijiazhuang, Hengshui and Cangzhou, and relatively low in Handan and Xingtai. At the grid scale, special phenomena appeared in local areas:primary coordination and mild imbalance occurred in the central Beijing and Tianjin; Handan, Xingtai small area to achieve good coordination. (3) The decoupling relationship between urbanization intensity and ecological resilience was in a state of benign development. Weak decoupling and expansion negative decoupling showed an upward trend, while strong decoupling showed a downward trend, indicating that urbanization had reached a certain level, which promoted the positive development of ecological resilience, and urbanization intensity and ecological resilience reached a coordinated state of sustainable development. The results of this study provide a scientific basis for the coupling 1analysis of urbanization intensity and ecological resilience.