Mikania micrantha H.B.K. is distributed mainly in Delta of the Pearl River and the eastern coastal areas in Guangdong Province. It is transmitted gradually from Shengzhen to the east, north and west of Guangdong Province. M. micrantha often establishes in open areas and the humid soil that has rich organic matter. It is the distribution center of the invasive M. micrantha that in organic domestic rubbish, the heap of sludge beside drainage ditches and abandoned fields. It spreads and extends far away from established fields by means of plenty of seeds and fast vegetative reproduction. Anthropic factor such as long-distance transport is the major reason that M.micrantha is transmitted in long range, Shrubs were damaged hard by M. micrantha and distributed secondary forests were damaged to a certain degree. Fruit trees were damaged larger because of weeding and fertilization.