On the basis of a review to the research development both at home and abroad of the impact of land use on the vegetation in urban area, this paper has analyzed the features of urban vegetation in city proper of Beijing with respect to the impact of urban land use on the vegetation. The conclusions are as follows:①Compared with the natural areas surrounding Beijing, the proportion of  Chenpodiaceae and Polygonaceae  in flora composition of species are on the increasing. The percentage ratio of colonized species are high is a typical feature for urban flora. ②Judging from the life form structure of the flora, the proportion of annual and biennial herbs is high in its composition. As to the areal-types of genus, pan-world genuses take a larger ratio than ever before with the development of urbanization process. ③Different urban land use types have different impacts on the urban habitats and communities. ④The diversity of habitat has more significant than the average acreage of habitat on sustaining the species diversity of urban vegetation.