To address the scientifi c issues of ecological function fragmentation and multi-species habitat network optimization mechanisms in the capital’s core area, this study selected the Great Spotted Woodpecker (Dendrocopos major), Far Eastern Hedgehog (Erinaceus amurensis), and Chinese Toad (Bufo gargarizans) as indicator species. A technical framework of “habitat resistance identifi cation - network connectivity assessment - spatial optimization” was constructed to support the refi ned management of green spaces in high-density built environments. Based on high-precision remote sensing data, four types of green space functional zones and three vegetation levels were classifi ed. Diff erentiated resistance surfaces were constructed by integrating abiotic elements. Core source areas and potential corridors were identifi ed using Morphological Spatial Pattern Analysis (MSPA). The Graphab platform was employed to quantify the Probability of Connectivity (PC), Delta Probability of Connectivity (dPC), Node Degree (ND), and the Size of the Largest Connected Component (SLC). This revealed the spatial diff erentiation characteristics of connectivity and proposed restoration plans for cross-species habitat vulnerable areas. Results show that core habitat patches account for over 50% of the total green space area, but their spatial distribution is unbalanced. Patches with high dPC values are concentrated in the northern and southern regions but are scarce in the eastern and western areas. Corridors exhibit the problem of localized high-level concentration alongside overall fragmentation. The interaction between species niche diff erentiation and green space functional zones infl uences the diff erences in habitat connectivity within the study area. Species’ selection of microhabitats based on vertical vegetation structure indirectly shapes the network pattern. Through spatial superposition optimization, 35 core source areas, 33 stepping stones, and 38 key corridors were ultimately identifi ed, revealing the diff erential infl uence of vertical habitats on species migration paths. The addition of 10 potential patches eff ectively mitigated connectivity breakpoints between the eastern and western regions, providing a scientifi c basis for biodiversity conservation and the precise management and control of green spaces.