Abstract: The study investigated and analyzed plant community structure of 253 samples in Dongtan wetland park. The results indicated: (1)on horizontal structure, there were 86 species of woody plant belonging to 47 families, 70 genera, among which 19 species were with high important values, the ratio was 0.56:1 between evergreen and deciduous trees, local and exotic species account for 32.56% and 67.44% respectively, the average breast-height diameter of trees was 8.64 cm, and 77.27% of trees had 5-15 cm breast-height diameter. (2)On vertical structure, the arbor-shrub-grass ratio was 14.52:14.97:48.83:100, 49.01% of samples were two-layer structure. (3)43.08% of samples had plant scenery only for two seasons, plant with good (4-5) and bad (1-2) average growth potential account for 24.42% and 20.93% respectively. On this basis, typical plant communities were analyzed, measures to optimize park greening in saline land of coastal areas were suggested.