Plant functional trait is of great significance to examine the adaptation strategies of plant species. In this study, we measured functional traits including both vegetative and reproductive organs and biomass allocation of six common plant species in Chongqing, including Distylium chinense, Acer palmatum, Loropetalum chinense, Broussonetia papyrifera, Ginkgo biloba, and Magnolia denudate under different habitats, aiming to examine their adaptation strategies in urban environment. The results showed that the functional traits except specific leaf area and biomass allocation were significantly different (P<0.05), with their values decreased along theruralsuburban urban gradient. Except forAcer palmatum, all species allocated the most biomass to reproductive organs and least to stems. Based on the results of principal component analysis of functional traits, the six species could be divided into three categories. The vegetative and reproductive organs of urbanadapted group were basically unaffected by the urban environment. The vegetative organs of the semi urban adapted group were little affected while the reproductive organs obviously affected. Both vegetative and reproductive organs of the urbanunadapted group were severely affected. The overall evaluation on functional traits showed that the performance of plants living in forest parks near country was the best, followed by those in suburban parks, and those in urban parks the worst.