Community green spaces are essential public infrastructure at the community level, and understanding their service range is crucial for planning and governance. This study addresses the phenomenon of overextended service ranges of community green spaces in central urban areas and the dual life circle facility usage of employed populations, proposing the dual-anchor hypothesis of residential and workplace locations. Using community green spaces in Huangpu District, Shanghai, as a case study, the research explores the explanatory power of visit distances under dual anchors, the clustering patterns of visit times, and the spatial distribution of residences. The study also examines the factors influencing overextended service ranges. The findings indicate that the dual-anchors analysis model, focusing on both employment and living, compared to the traditional single-living-anchor model, enhances the explanation of the service range of community-level public green spaces in the central urban area, and the service range is influenced by the distance between employment and living spaces, the two types of anchors exhibit different peak access times. The extended service distance of community-level public green spaces in the central urban area constitutes a profile of job-residence separation, and the impact of job and residence activities should be considered in the governance and planning of public green spaces.