Abstract:Based on the field investigation and literature review, species composition, damage degree, life form, origin and invasive habitat of alien invasive plants in Nanning, Guangxi Province, were studied. The results showed that there were 72 alien invasive species belonging to 55 genera of 25 families in Nanning, in which there were 19 species in Asteraceae, 9 species in Poaceae, 6 species in Amaranthaceae, and 6 species in Solanaceae, accounting for 26.4%, 12.5%, 8.3% and 8.3% to total species, respectively. Based on occurrence frequency and population density of alien invasive plants in Nanning, 12 species had caused serious harm (eg. Alternanthera philoxeroides, Eichhornia crassipes, Lantana camara, Parthenium hysterophorus and Wedelia trilobata), 17 and 43 species had caused middle and light harm, respectively. There were 62 species, accounting for 86.1%, origin from America, and 5 species from Africa, 3 species from Mediterranean Sea and 2 species from Europe. There were 57 herb, 10 shrub, 3 tree and 2 liana species, accounting for 79.2%, 13.9%, 4.2% and 2.8%, respectively. These species often distributed in high disturbed habitats with rich resources. The invasive species in Nanning shared much common to Guangzhou, Macau and Xiamen, whereas few to Qingdao, Beijing and Shenyang. The control strategies of alien invasive plants in Nanning were summarized.