Based on relevant materials, the paper had analyzed the macro-function of roadside trees from the perspectives of urban eco-environment construction and urban plants landscape construction. By taking Yangling City as the demonstration area, the field study had been conducted on trees along 38 roads, which had been analyzed from the aspects of the species of roadside trees, disposition modes and seasonable change. It had found that roadside trees were abundant, including 27 species belonging to 22 families, but the disposition mode was simple. In view of existing problems, suggestions had been proposed. It should make use of native tree species to construct regional characteristic roads; enhance evergreen tree species and enrich seasonable scenery; cultivate fast-growing and slowly-growing tree species alternately and avoid landscape blank; dispose upper, middle and lower layer of plants species reasonably and construct multiple layers of plants landscape. Several good roadside tree species had been recommended, so as to provide scientific reference for roadside greening construction.
