Abstract： [Objective] To investigate the spatial and temporal variations of urban land green utilization efficiency and the influencing factors, so as to provide scientific basis for optimizing the development and protection pattern of national land space and promoting the sustainable development of urban land. [Methods] The slack based measure - directional distance function (SBM-DDF) model was used to measure the green land use efficiency of urban land in Anhui Province from 2008 to 2022, and the kernel density analysis and center of gravity migration models were selected to analyze the spatial and temporal variations, while the geodetector and geographic time weighted regression (GTWR) models were combined to study the factors influencing the urban land use efficiency. [Results] ① The average value of green land use efficiency of urban land in Anhui Province within 2008-2022 is 0.77, and the whole is divided into two phases of straight-line decline from 2008-2014 and fluctuating increase from 2015-2022. ② polarization phenomenon in the region, the low value of the city increased, the high value of the city is more stable, the regional gap is gradually expanding; efficiency value of the province's center of gravity trajectory first to the southeast and then migrate to the northwest, northwestern and southeastern regions to improve the more pronounced, but is still “high in the south and low in the north,” unbalanced spatial characteristics. ③ The factors are environmental protection inputs, urban and rural structure, urban greening, environmental regulation and industrial structure, among which the interaction between industrial structure and environmental protection inputs is the strongest, with a q-value of 0.82. The spatial heterogeneity of the leading factors is significant, with urban greening influencing all cities positively, urban and rural structure, environmental regulation and environmental protection inputs influencing the central and southern regions positively and negatively in the northern region, and the negative influence of industrial structure on the resource cities is prominent. The negative influence of industrial structure on resource-oriented cities is prominent. [Conclusion] It is suggested that strict land use control, promotion of industrial structure upgrading, increasing ecological and environmental protection, strengthening the overall collaborative development, and formulating differentiated development paths should be used to promote the overall improvement of green land use efficiency in urban areas of Anhui Province.