As a new energy source, wind power is the mainstay of building a new power system, which can effectively contribute to decarbonize the power system and achieve carbon peak and neutrality targets. However, the contradiction between the large-scale construction of wind power and ecological protection is becoming increasingly prominent. It is urgent to clarify the impact of wind power projects on the ecological environment, especially on potential ecological corridors and regional ecological security patterns. This study took Pingtan as the study area, and applied Morphological Spatial Pattern Analysis, Minimal Cumulative Resistance and gravity models to identify importantly ecological source sites and potential corridors. In addition, the impacts of wind power projects on the connectivity, pathways and importance of ecological corridors were assessed. The results showed that: (1) the ecological sources were mainly located in forest parks and scenic spots with high ecological value. The fragmentation of ecological source was increasing due to the impact of wind power projects. The percentage of ecological core areas decreased from 79.53% to 76.64%. (2) Wind power projects have reduced ecological corridor accessibility, significantly changed the alignment and length of ecological corridors, and greatly increased the spatial resistance for biological migration. (3) The wind power project weakened the correlation between ecological source sites. Both important and secondary corridors were reduced by six and the ecological corridors of high importance completely avoided the location of the wind power project. After the construction of wind power projects, the ecological network became less fluid, more homogeneous, and less effective overall. This study not only provided a reference for biodiversity conservation and ecological security patterns in the ecologically fragile areas around wind power projects, but also provided important methodological support for wind power project siting and environmental quality assessment.