【Aim】 In this study, we sought to ascertain the invasibility of Qingchuan County, Sichuan Province, China, to provide a scientific foundation for preventing and controlling exotic invasive species and safeguarding ecological security within the region. 【Method】 The investigation into alien invasive plants in Qingchuan County was conducted utilizing the sample line and quadrat methods, augmented by a review of pertinent literature and officially published lists. Statistical analyses were performed on invasive plant families and genera, their regions of origin, types of plant life, and distribution levels. Subsequently, by applying the analytic hierarchy process, 44 indicators were identified to formulate a risk assessment system for invasive alien plants in Qingchuan County, focusing on the four dimensions of incoming colonization risk, dispersal risk, potential hazards and impacts, and hazard control. The invasive alien plants in Qingchuan County were classified into distinct risk categories. 【Result】 The results revealed 32 species of invasive alien plants in Qingchuan County, representing 12 families and 25 genera. The Asteraceae family was the most significant, comprising 13 species, which accounts for 40.6% of the total species, followed by the Poaceae and Solanaceae families, each containing three species and contributing 9.4% of the total species. Analysis of the invasive alien plant origins revealed that most of these invasive alien plant species were native to the Americas, accounting for 62.5% of the total species. Annual herbs exhibited markedly higher adaptability than other invasive types, with 14 species accounting for 43.8% of the total species. Based on the invasion severity, three species were identified as belonging to the very high-risk category (Level Ⅰ): Solidago canadensis, Alternanthera philoxeroides, and Dysphania ambrosioides. Additionally, six species were classified as high-risk (Level Ⅱ), ten as medium-risk (Level Ⅲ), and 13 as low-risk (Level Ⅳ). The distribution profile indicated that invasive alien plants proliferated along major traffic intersections of highways, flanking roads linking different towns, and in areas characterized by frequent human activities, such as residential zones. Conversely, they are less prevalent along winding paths and within strictly protected areas. 【Conclusion】 The presence of numerous invasive alien plants in Qingchuan County, each exhibiting varying levels of risk, necessitates the implementation of classified policies alongside zoning and hierarchical management strategies tailored to these differing invasion risk levels. Scientific prevention and control must be conducted, thereby maximizing biodiversity conservation and ecological security in Qingchuan County.