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The naturalization and invasion of alien species have caused a serious impact on the global environment and social development, and have become a global problem faced by countries in biodiversity management and ecological conservation. China is one of the countries most seriously affected by alien invasion, and the situation is serious in the early warning, management and governance of alien invasion. Based on field surveys and literature research, Chenopodiastrum murale (L.) S. Fuentes, Uotila & Borsch, an alien invasive plant of Amaranthaceae sensu lato, is first reported for flora of China. C. murale is native to the Mediterranean region and has spread to more than 40 countries in Europe, America, Africa and Oceania. It is an invasive alien plant with great harm, and it is also clearly prohibited by customs and quarantine departments. This exotic invasive plant is now found in Chenggong District, Kunming City, Yunnan Province. This paper describes the morphological characteristics of the species in detail, as well as brief introduction of its taxonomical history, and provides field ecological photos for identification and comparison. In addition, the possible introduction route of C. murale was analyzed, and its potential harm and invasive risks were briefly assessed. This new record clearly demonstrate that the background survey of Chinese alien invasive plants is still insufficient.