Abstract: With the methods of routine and sampling survey, the investigation about invasive plants on Dongshan Island was conducted.The results showed that there were 1055 kinds of plants existing on Dongshan Island, 632 kinds of which were native wild plants, 423 kinds were alien and cultivated plants, and there were 59 invasive plants among the alien and cultivated ones, belonging to 22 families,with Asteraceae accounting for the largest percentage of species composition of 27.1%, which has 16 species; 45 species of invasive plants origined from America, accounting for the highest percentage of origin of 76.3%; most plants were introduced with no intention, which has 32 species, accounting for 54.24%. Based on the analysis of origin, habitat, way of introduction, harmfulness and life style of alien invasive plants on Dongshan Island, this paper proposed some management strategies to enhance the management of invasive plants.

Key words: Dongshan island, invasive alien plants, investigation