Does digital economy promote urban land green use efficiency?

Digital economy (DE) optimizes resource use and reduces pollutant emissions, which can provide new idea and approach for green development. The study chose 270 Chinese cities to analyze the impact of DE on urban land green use efficiency (ULGUE). Moreover, we explored spatial–temporal heterogeneity of DE’s effect on ULGUE and the interrelated effect between DE and other influencing factors on ULGUE. Our results show that ULGUE and DE presented a gradual upward trend, with obvious spatial–temporal differentiation characteristics. Moreover, DE had a positive effect on ULGUE, and as ULGUE increased, the effect of DE became higher. The influence of DE on ULGUE was highest in Northeast China and lowest in Western China. There were differences in the impact of other factors on ULGUE under different thresholds of DE. These findings provide scientific reference for developing DE and promoting green use of urban land, which is conductive to the realization of sustainable development.