Abstract: The species abundances of plant communities at Xiamen city parks were investigated. The arbor layer in Xiamen city parks is 75 species in 28 families and the shrub layer have 48 species in 30 families. Among these species, robusta trees are the most abundant, accounting 22.7% of the arbor and 27.1% of the shrub. The dominant species at arbor layer are Washiongtonia robusta, Ficus microcarpa, Roystonea regia, Delonix regia, Caryota ochlandra, Alstonia scholaris, Bauhinia variegate, Bombax malabaricum, Erythrina orientalis, Cinnamomum japonicum, Acacia onfuse. The dominant species of shrub layer mainly are Rhododendron simsii, Osmanthus fragrans, Hibiscus rosa sinensis. The species abundance indices of tree layer in Xiamen city parks are 6.136 4, 0.68 of the Simpon index, 1.962 3 of the ShannonWienner index and 0.795 0 of the Pielou index. The species abundance indices of the shrub layer are 5.957 4, 0609 9 of the Simpon index, 1.685 9 of the ShannonWienner index and 0.725 3 of the Pielou index. In general, the diversity index among the Xiamen city parks is higher than that of the other cities.