The rapid development of urbanization aggravates the degradation of ecosystem. How to reverse the degradation of ecosystem and meet the increasing demand for ecosystem services has become a hot research topic. To some extent, the construction of ecological security pattern can balance the relationship between urban development and eco-environmental protection, which is of great significance for ensuring regional ecological security and promoting ecosystem function. In this study, we used Xiamen as an example, and the framework of "ecological source identification-construction of ecological resistance surface-extraction of ecological corridors" was adopted to construct the ecological security pattern of land area. The assessment of the ecosystem services importance and morphological spatial pattern analysis were combined to identify the ecological source. This method took both ecological structures and functions into account, making the identified ecological source more comprehensive. The ecological comprehensive resistance surface was constructed by land use type, elevation and slope, and corrected by human settlement index to reduce the influence of subjective assignments, identify the differences within each land use type, and make the construction of ecological resistance surface more reasonable. On this basis, the minimum cumulative resistance model was used to extract ecological corridors, and the gravity model was used to quantify the relative importance of potential ecological corridors, and then to classify the importance of ecological corridors. The results showed that the ecological safety pattern of Xiamen city consisted of 14 ecological sources, 21 ecological corridors, 15 ecological nodes, and several stepping stones. The distribution of ecological sources mainly concentrated in the west and north of the study area, dominated by woodland and grassland, and the total area was 558.64 km². The length of the ecological corridor were about 159.40 km, of which 9 were key ecological corridors and 12 were general ecological corridors, which had the characteristics of close connection between east and west and insufficient connection in north-south direction. According to the contribution to the regional ecological security, the ecological security pattern was divided into three control zones for hierarchical control. Comparing the findings with the current implementation plan of Xiamen, although the results were different, they were relatively consistent overall, and the main reason for the difference was the different research data and methods used in the two studies. Therefore, this study concluded that the combination of ecosystem service importance assessment with morphological spatial pattern analysis, minimum cumulative resistance model, and gravity model could provide a scientific basis for the construction of ecological security pattern.