In the traditional studies on the construction of ecological network or ecological security pattern, based on the minimum cumulative resistance (MCR) model to extract the minimum cost path as ecological corridor, and artificial ecological node. But it lacks consideration of the exchange process such as energy flow and information flow in the ecological process, which leads to some deficiencies in the structure and function of the ecological network. We selected Shanghang County in Fujian Province as study area. We selected the national forestry parks, wetland reserves, nature reserves etc. as the main ecological sources and took land cover types, distance to roads, relief, slope, distance to water, normalized difference vegetation index (NDVI) and other factors as resistance factors. Based on migration characteristics of terrestrial animals, we used entropy weight method to obtain the weight for the weighted superposition to generate a comprehensive resistance surface. Then we used hydrological analysis principles (HY) and circuit theory in Linkage Mapper toolbox (LM) to comprehensively identify eco-corridors and eco-nodes. The gravity model is used to evaluate the importance of eco-corridors and eco-nodes and classify them into different levels. The research results showed that:(1) a total of 187 eco-corridors, 52 ecological pinch points and 55 ecological barrier points were extracted based on the LM method, and 240 eco-corridors and 133 eco-nodes were extracted based on the HY method; (2) The eco-corridors and eco-nodes extracted by LM and HY were superimposed, and a total of 197 eco-corridors, 30 radiation corridors, and 283 eco-nodes were extracted; (3) Using the gravity model, we extracted key 103 eco-corridors (including 30 radiation corridors), 124 general eco-corridors, at the same time identified 97 key eco-nodes and 186 generally eco-nodes. The key eco-corridors and key eco-nodes were mainly concentrated in areas with high resistance values and relatively high resistance values, and the key eco-nodes distribution around the ecological source; (4) Based on the analysis of the composition of land cover types in areas where key eco-corridors and key eco-nodes buffer areas located, it is found that the proportion of forest, farmland and grassland had the absolute advantage, and optimization and ecological construction strategies were proposed for each type of land cover due to ecological connectivity and habitat quality. The results can provide reference for network construction of ecological security pattern in local, national spatial planning and ecosystem restoration, and also can provide scientific basis for biodiversity protection and ecological civilization construction.