The rapid urbanization of coastal zones has intensified ecological challenges in both land and marine environments, leading to increased landscape fragmentation. The scientific establishment of ecological network, which plays a pivotal role in safeguarding coastal biodiversity and ecological security, represents a significant approach to effectively connecting fragmented habitats within the coastal zone. The study selected Jinzhou in Liaoning Province and its adjacent coastal seas as the research area. The ecological sources within the study area were identified by supplementing ecological red line data, employing morphological spatial pattern analysis (MSPA), comprehensive habitat quality evaluation, landscape connectivity assessment, and ecological sensitivity evaluation. The land-sea integrated resistance surface was constructed by considering both natural and anthropogenic impacts. Ecological corridors were extracted based on circuit theory, and measures to optimize the ecological network were proposed. The results showed that: (1) The ecological sources of Jinzhou City was primarily distributed in the significant ecological functional areas or sensitive regions such as Yixian Yanwulu Mountain, Xihe Mountain, Dabijiashan special protection island, and Liaohe Estuary Protection area, with a total area of 1840.35 km2 (2) The ecological corridors within the study area were primarily located in the municipal areas of Jinzhou City District, Linghai City, Yixian County, Beizhen City, and Heishan County. The distribution of corridors in the sea area was relatively sparse. (3) The addition of supplementary ecological sources significantly improved the connectivity of the optimized ecological network. The results of the study can provide scientific insights for guiding the construction of coastal ecological networks and integrated land-sea ecosystem management in coastal regions.