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To address this challenge and achieve high-quality development, the scientific construction of the ecological security pattern in coastal areas can effectively balance regional development and ecological protection. Taking Dongying City, a coastal resource-based city, as an example, the ecological sensitivity assessment was used to identify ecological sources. Based on the distribution patterns of crucial ecological elements such as land, rivers and beaches, ecological source partitions were delineated. The security pattern of “surface (ecological sources)-line (ecological corridors)-point (ecological pinch points, ecological barrier points)” was then constructed from the perspectives of dispersed ecological sources and ecological source partitions, and key areas for ecological protection and land space restoration were comprehensively identified. The results showed that there were 49 ecological sources in Dongying City, mainly distributed in lowaltitude coastal wetland regions of the north and east, mainly distributed in of which 17 ecological source partitions were identified. The integrated resistance value was up to 98.742, with high resistance predominantly clustered in the built-up area and its vicinity. Totally 84 ecological corridors from ecological sources and 24 from ecological source partitions were established, the overlapping ecological corridors had more ecological significance. Moreover, totally 72 ecological pinch points were identified, particularly emphasizing the need for focused maintenance at the river corridor. Additionally, totally 54 ecological barrier points were mainly concentrated in Dongying District, Kenli District and Lijin County. Tailored protection, maintenance, management, and restoration strategies were proposed for types of critical areas, aiming to coordinate comprehensive ecological protection across “l(fā)and-river-beach-sea”and provide a reference for constructing and optimizing the ecological security pattern in similar coastal areas.