Urban agglomerations have become a new spatial unit for global economic competition and had important functions in promoting urbanization, achieving high-quality allocation of resources and driving economic development. Intense socio-economic activities, however, are bound to cause damage to the ecosystem services of urban agglomerations. It is important to conduct studies on the spatio-temporal evolution of the ecosystem services of urban agglomerations and explore its driving factors. In this study, Beijing, Tianjin and the Beijing-Tianjin Ring were selected as the study area. The experiments constructed an ecosystem service evaluation system for the study area by summarizing regional issues, calculated ecosystem services from 2000-2018, and also analyzed their spatial and temporal evolution characteristics. Then, the potential drivers were screened out by the ordinary least squares model of the experimental data and imported into the geographically weighted regression model for regression. Finally, the driving role of natural and social factors on ecosystem services is explored, through an analysis of geographically weighted regression results. Firstly, the ecosystem services of the Beijing-Tianjin-Hebei urban agglomeration showed an upward and then downward trend from 2000 to 2018, reaching the highest value in 2015. Secondly, Spatially, the ecosystem services in the study area generally show the spatial differentiation characteristics of high value areas in the northern regions of Yanshan Mountains and Taihang Mountains, and low value areas in the dam area. At the same time, the evolution of ecosystem services spatially shows the boundary between Yanshan and Taihang Mountains, with the Yanshan and Taihang Mountains regions showing a trend of first weakening and then improving, while the northwest region shows an overall weakening trend and the southeast region gradually decreases from 2015 onward. Thirdly, Natural environment and socio-economic factors drive ecosystem services in descending order of strength:rainfall > soil sand content > population density > temperature > infrastructure density. Fourth, the population density, soil sediment concentration and infrastructure showed significantly negative correlation driving characteristics, while the rainfall showed significantly positive correlation driving characteristics, while the temperature showed negative correlation in the south and positive correlation in the north, with an increasing trend from southeast to northwest. Overall, by assessing the ecosystem services of the Beijing-Tianjin urban agglomeration, analyzing the analytical evolution characteristics of regional ecosystem services, and exploring the driving roles of regional natural and social factors on ecosystem services, this study provides scientific guidance and decision basis for the future ecological environmental protection and planning strategy formulation of the Beijing-Tianjin urban agglomeration.