Abstract: As one of the three strategic patterns of territorial spatial planning, ecological security pattern is an important guarantee for ecological security in coastal areas. This study follows the concept of “land-sea integration and ecological priority”, based on the general idea of “background analysis-element identification-pattern construction”, and uses ecological sensitivity evaluation, minimum cumulative resistance model and “source-corridor-node” model to plan and construct the ecological security pattern of Maoming coastal zone. The results show that: (1) In study area, coastal erosion and special habitat are mainly insensitive; general habitat is mainly slightly sensitive; soil and water loss, storm surge, red tide, and coastal zone utilization are mainly moderately sensitive; and social economy is mainly highly sensitive. (2) The ecological sensitivity of the study area is generally high, and the comprehensive sensitivity index of land–sea complex system shows a spatial variation of “decrease-increase-decrease” from land to sea. (3) The study extracts a total of 21 ecological sources, with an area of 116.78 km²; 35 ecological corridors and 24 ecological nodes are identified, showing a spatial distribution pattern of “one horizontal, five verticals and three rings” and “more land than sea, more south than north” respectively. (4) The study has constructed an ecological security pattern of “one belt, three bays, five corridors, and multiple nodes” ; on this basis, the planning guidelines are put forward to provide scientific guidance for the ecological civilization construction of Maoming coastal zone.