Leaf functional traits can reflect the response and adaptation strategies of plants to different environments. Taking Eurya Emarginata from Haitan Island, Dalian Island and Dahuai Island in Fuzhou City, Fujian Province as the research object, the influence of environmental factors on leaf functional traits of Eurya Emarginata were analyzed by measuring 16 leaf functional traits and 14 environmental factors. The results showed that:(1) the coefficient of variation of functional traits in Eurya Emarginata leaves ranged from 2.26% to 25.78%. Among them, the variation degree of leaf volume was the largest (25.78%), and the variation degree of leaf water content was the smallest (2.26%). There were significant differences in most of the leaf functional traits from different islands (P<0.05), which indicated that functional traits in Eurya Emarginata leaves were rich in diversity and showed strong adaptability to the alienated environment; (2) There were significant differences in the soil factors of different islands (P<0.05); (3) By systematic clustering, 30 Eurya Emarginata samples could be clustered into two groups, Haitan Island and Dalian Island were one group, while Dahuai Island was one group. The result was similar to the island type and geographical distribution; (4) The redundancy analysis showed that the functional traits in Eurya Emarginata leaves were mainly affected by crown density, soil total potassium, soil available phosphorus, altitude, soil available potassium and alkaline hydrolyzable nitrogen. The Eurya Emarginata adapted to harsh environments by variation and combination of traits, as well as the interaction with environmental factors. The results, which facilitated a better understanding of the adaptations of Eurya Emarginata to the different islands and the ecological strategies in the islands, played a vital role in the nutrient utilization strategies of Eurya Emarginata and revealed the response mechanism of plants to the environmental changes.