Abstract: Forest function is determined by its structure, and the structure can be reflected by its function. Through investigation of current situation of urban forest structure and analysis of the existing problems and spatial laws, this paper provided basic data and reference basis for the planning and the construction of urban forest in Qingshen county. The green space in Qingcheng county was classified into three categories, that is, park green space, road protection green space and attached green space. Through whole or sampling survey to the woody plants in these three kinds of green space, the characteristics of species composition was analyzed, and the species diversity, diameter class structure and crown structure were calculated. The results showed that: (1) there were 96 species of woody plants (species in the Bamboo Forest Wetland Park were not included) in urban forest of Qingshen county, belonging to 76 genera, 45 families. (2) Evergreen species were dominant in urban forest greening woody plants, and the species number of evergreen plants was 1.88 times of deciduous ones. (3) The attached green space possessed the highest species diversity, followed by the park green space, and with the lowest in the street protection green space. (4) By classification of ornamental parts, individual shape and flower species were dominant, accounting for 36.73% and 29.59% of the total species respectively, and color-leafed species occupied 13.27%. (5) The most arbor species were 10−20 cm in DBH and 2−4 m in crown diameter, accounting for more than 50%. The species diversity of urban forest in Qingshen county was not rich enough; thus, in the future urban forest construction, more attention should be paid to configuration of multiple native species, and increasing the species and quantity of color-leafed, flower and fruit plants.