Abstract: Urban green space (UGS) plays a pivotal role in sustaining ecosystems and human well-being; however, few studies focus on how UGS quantitatively, structurally and qualitatively evolves in response to human well-being demands. The present study examines Beijing's UGS dynamics through a human well-being lens, synthesizing existing research to reveal its responsive evolution patterns. Our findings indicate that since the 1980s, Beijing's UGS has undergone decreasing and then increasing changes, with park areas showing the most significant expansion. Spatial analysis reveals: 1) The overall distribution of urban green space in Beijing is uneven, with less green space in the central area and more in the peripheral area and there was regional aggregation in large parks. 2) The connectivity between green spaces has been restored in recent years, and at the same time, the complexity and heterogeneity of landscape have been improved. Based on the elevated level of human well-being, the evolutionary logic of UGS in Beijing is demonstrated as follows:①Renewed perceptions of physical well-being help to move UGS off a declining trajectory; ②Safeguarding human well-being is a priority in planning UGS; ③Environmental well-being is a long-lasting evolutionary direction for the future of UGS. Green space construction in Beijing should deepen and improve the feedback loop of UGS for human well-being. For future development, we recommend that: ①strengthening the UGS-well-being feedback mechanisms through multidimensional human-centered structural optimization; and ②advancing environmental quality as a more long-term goal to ensure balanced accessibility. This study reorients UGS planning from passive provision to active responsiveness, offering a new paradigm for sustainable urban greening strategies.