 Urban green spaces play a crucial role in improving the quality of life for urban dwellers. This study examined the long-term changes in residential exposure to green space in Beijing, China over the past three decades. The results showed that the urban green space was mainly concentrated in the fourth and fifth rings of the city, with little green space in the inner city. Additionally, the degree of inequality in residential exposure to green space decreased significantly from 1990 to 2020. Furthermore, the spatial temporal analysis of residential exposure to green space based on green space quality could be used to identify degraded or lost areas of green space. This article was authored by Yu Chao, Guangdong Li, and Yao Hui Huang.