[Aim] The study of the relationship between the invasive ability of exotic plants and their functional traits remains important in invasive ecology.[Method] In this study, an invasive species, Flaveria bidentis, was grown with selected plants, individually or in mixture, in a common garden experiment. The functional traits of F. bidentis were measured as well as the level of competition with these different plant species.[Result] Kochia scoparia, Abutilon theophrasti, Sorghum sudanense and the mixture of S. sudanense, K. scoparia and Melilotus officinalis had an inhibitory effect on the growth of F. bidentis. Biomass, number of stems and plant height of F. bidentis significantly increased when grown with A. retroflexus along or in a mixture with M. sativa and A. retroflexus. Root to shoot ratio and root length, plant height, C content, and number of branches had significant lower values when exposed to the other plant species. N content of F. bidentis significantly varied depending on the treatments. Root tissue density and specific leaf area significantly increased when grown together with the other species.[Conclusion] Different plants have different effects on the F. bidentis in competition. K. scoparia and Abutilon theophrasti can significantly inhibit the growth and modify the main functional traits of F. bidentis. However, M. sativa and A. retroflexus promote the growth and development of F. bidentis.