Abstract:At present, people have increasingly higher expectations for urban environment, and landscaping is the most direct or effective measure to improve the environmental quality. The chief materials used in landscaping are garden plants and the major part of which is tree. As a city, if the varieties of garden trees are more, the garden space is more rich and colorful. But the application of the varieties of garden trees is constrict by natural factors and artificial factors, such as region, climate, science and technology, economy. The selection of tree species not only adapts to native land, but also forms the local characteristic and style.