【Objective】This study analyzed bird diversity and ecological protection status in Jintan ecological redline areas of Changzhou City in order to provide a basis for biodiversity conservation. 【Method】Sampling plots and lines were used to study bird diversity from 2018 (autumn) to 2019 (spring and summer), count quantitative characteristics of bird populations in different habitats and seasons, and analyze distribution differences among habitats and seasons by calculating the Margalef index, Shannon-Wiener diversity index, Simpson index, Pielou's evenness index and coefficient of similarity. 【Result】A total of 89 species of bird belonging to 13 orders and 38 families were identified, among which Passeriformes had the largest share of species (50.56%). We identified four species of national second-class protected animals and 36 species of Jiangsu provincial protected animals. Resident birds were the main bird type (37.08%), while passing migrant birds were the least common (6.74%). There were significant differences in various indices among the different habitats, including the Margalef index (high to low: lakes wetland, farmland, forest and urban greenspace), and Shannon-winner index and Simpson index (high to low: farmland, lakes wetland, urban greenspace and forest). Differences in the Pielou's evenness index (high to low: urban greenspace, farmland, lakes wetland and forest) were not significant. Bird species and numbers were most abundant in summer, but the highest Margalef index was in spring; other diversity indices did not have significant differences among seasons. The similarity between farmland and forest was the highest, and the difference between farmland and lakes wetland was the largest; the similarity index of birds in summer and autumn was the highest. 【Conclusion】Habitat type is the main factor affecting changes to bird community structure in Jintan ecological redline areas of Changzhou. The distribution and selection in different habitats reflects the needs of birds for various environmental factors. Compared with urban greenspace (with human disturbance) and forest (with a simple stand structure), lakes wetland and farmland offer richer resources and higher spatial heterogeneity to support greater diversity.