Abstract:【Aim】 In view of the misunderstandings in the identification of the alien invasive plant Solanum viarum Dunal, detection and identification methods were established, and its suitability in China was analyzed to provide effective technical support for the prevention and control of alien invasive species at ports. 【Method】 The morphological and molecular methods were used to identify S. viarum, and the suitable factors were determined according to the biological characteristics of S. viarum. The principle and method of fuzzy mathematics comprehensive evaluation were used to quantitatively analyze its suitability in various regions of China. 【Result】 The waxy gene sequence alignment can be used to distinguish S. viarumfrom other Solanum plants. It is suitable for the identification of S. viarum seedlings or samples with missing identification features or seed samples. It can solve the problem that S. viarum is easily confused with S. capsicoidesand S. aculeatissimum. The results showed that the potential suitable areas of S. viarum were distributed in Jiangsu, Hebei, Tianjin, Shanghai, Guangdong, Hainan, Zhejiang, Guangxi, Shandong, Anhui, Fujian, Hubei, Jiangxi, Beijing, Xinjiang, Hunan, Henan, Chongqing, Guizhou, Shaanxi, Sichuan, Shanxi, Yunnan, Gansu and Xizang. 【Conclusion】 In view of the wide potential distribution, strong adaptability and great harm of S. viarum, it is suggested to strengthen the monitoring and control of S. viarum in the above areas.