Abstract: In order to promote the selection and application of street trees species in southern Fujian,the assessment of the risk degree of urban street trees in the main urban area of were investigated and analyzed by visual tree assessment.The results showed that,Ficus benjamina had the highest potential hazard index（30.4）,followed by Mangifera indica（29.8）.Those with a potential risk index of over 20 include Spathodea campanulata,Pterocarpus indicus,Ficus virens,Bischofia javanica,Alstonia scholaris and Syzygium hainanense;Those with a potential risk index of over 10 include Ficus religiosa;Those with a potential risk index of less than 10 include Cinnamomum camphora and Delonix regia,the possibility of danger is relatively small.