以西安市主城区为研究区，采用OSM道路数据，通过计算道路网密度、识别多层次道路社区分析空间结构。结果表明：(1)从整体空间上看，西安市主城区道路网发展水平整体较高，以老城区为中心，在主城区北部区域逐渐向外圈层式扩展分布；(2)从全局尺度来看，西安市主城区表现出多个中心共同发展的城市结构，老城区与周围各区互相影响，形成新的道路空间分布结构，由内向外逐渐扩展，将城市中心分散化，形成多个中心；(3)从局部尺度来看，除长安区外，各区内部发展均衡，以碑林区、新城区和莲湖区为中心，圈层式向外发展，呈现出中心强外圈弱的空间结构。

Taking the main urban area of Xi'an as the research area, we used OSM road data, and analyzed the spatial structure by calculating the road network density and identifying multi-level road communities. The results show that(1)from the overall spatial perspective, the road network development level in main urban area of Xi'an is relatively high as a whole. The road network is centered in the old urban area and gradually expands to the outer circle in the northern area of main urban area.(2)From the global scale, the urban area of Xi'an shows the urban structure of the common development of multiple centers. The old urban area and the surrounding districts interact with each other, forming a new spatial distribution structure of roads, which gradually expands from inside to outside, dispersing the urban center and forming multiple centers.(3)From the local scale, except Chang'an District, the internal development of each district is balanced, with Beilin District, Xincheng District and Lianhu District as the center, and the development of outer circle, showing a spatial structure of the center is strong and the outer circle is weak.