[Aim] This study aimed to examine the characteristics, life form, origin, and damage of alien invasive plants in Zhanjiang, and to provide a scientific decision-making basis for their management.[Method] Species composition, life form, origin, and introduction pathways were obtained through a combination of field investigations, literature review, Internet resources, and specimen records.[Result] A total of 112 invasive alien species belonging to 37 families and 89 genera were identified. The families with the highest number of species were Asteraceae, Fabaceae, and Poaceae (21, 13, and 13 species, respectively), accounting for 41.96% of all species recorded. Most recorded invasive alien species were herbaceous (98 species:87.50%). The primary method of introduction was intentional by humans (62 species:55.36%). Invasive plants primarily originated from America (82 species:73.21%). In terms of invasiveness risk of all species, 23 were aggressively invasive (grade 1), 35 were seriously invasive (grade 2), 21 were locally invasive (grade 3), 15 were generally invasive (grade 4), and 18 had insufficient data (grade 5).[Conclusion] A large number of alien invasive plant species were found in Zhanjiang. This is likely related to its unique geographical location and increasingly frequent human activities. Therefore, we should promptly strengthen the supervision and control of invasive plants in this region.