【Aim】Due to its coast and border location, the Yalu River estuary wetland is highly susceptible to biological invasion. This study aims to examine the invasive status of alien plant species in this area and provide a scientific basis for their effective management and decision-making within the estuarine wetland ecosystem. 【Method】 We conducted field investigations and utilized phytogeographic methods, complemented by existing literature, to examine the species composition, origin, life forms, and dispersal modes of invasion plants. 【Result】 In the Yalu River estuary wetland, we identified 33 alien invasive species from 26 genera and 11 families. The Compositae, Leguminosae, and Amaranthaceae families were predominant, accounting for 57.57% of the total species. These floristic families exhibited a global distribution pattern, while at the genus level, pantropical and global distribution was prevalent. The majority (51.52%) of these species originated in America. Herbaceous plants constituted the dominant type (90.91%), with ground bud and annual plants dominating the life form (87.87%). Achenes were the primary fruit type (27.27%). Self-propagation and wind propagation were the main modes (63.63%) of dispersal. According to the threat grade assessment, 39.4% of the total species were classified as highly invasive, threatening (Grade I) or significantly invasive (Grade II) grades. 【Conclusion】 The Yalu River estuary wetland harbors a diverse range of alien invasive plant species, with Compositae, Leguminosae, and Amaranthaceae particularly prevalent. Herbaceous plants are dominant, and their invasive pathways are complex. Many of these invasive plant species have already become a significant threat. Thus, it is imperative to strengthen monitoring and warning management systems and better management of coastal habitats to prevent the spread of these invasive plant species.