Abstract: Parks are the important part of the urban ecosystem. 16 typical samples of the Emancipation park in Wuhan were selected,and the diversity index, the importance value of dominant families and dominant species were obtained by field survey and typical plot method. The results showed that there were 490 species of plants in the park, belonging to 170 families, 375 genera, among which there were woody plants of 95 families,including 174 genera and 249 species,and herbs of 75 families,including 202 genera and 240 species. The descending order of species richness was tree layer, shrub layer, herb layer; the descending order of shannon-wiener diversity was tree layer, shrub layer, herb layer; the descending order of Simpson diversity was herbaceous layer, tree Layer, shrub layer; and that of Pielou uniformity was tree layer, shrub layer, herb layer. The tree layer was of high richness, and herbaceous layer was of high similarity, some herbaceous species had been gradually disappearing. Native tree species did not play a leading role in the park,so it was recommended to increase the local tree species and deciduous plants for protecting the growth environment of herbaceous layer in the extensive management of shrubs.