中国城市化进入快速增长期，学术界对东部沿海城市的空间发展模式已做了诸多研究，但对于中西部欠发达地区特大城市空间结构的变化研究不多。本文运用第一手的调查资料和第四次、第五次全国人口普查的数据重点针对1990年之后南宁城市空间结构的演变作实证研究。以城市空间发展的生态边界作为约束条件，以街道办事处为基本空间单元划分南宁城市中心区，分别从社会人口、产业布局、土地利用与交通三个方面，运用定量研究的方法，对比研究1990年代初和2000年后，在此三者作用下城市空间结构的变化，之后综合政府政策对城市空间结构的影响，将各个因子对空间的影响叠加综合，来考察南宁城市空间结构的演化，推演出近20年来南宁城市空间结构的演变模型，总结其变化的特征，提出城市中心分移的理论假说，并与国内外相关模型进行了比较。本文研究认为，1990年至今，在人口自然流动、政府政策、土地开发和产业布局变动等多种因素合成作用下，南宁城市中心存在一个分移的过程。城市空间结构已由单中心圈层结构演变为两心结构，两者之间以一条轴带相连。在人口流动和城市中心分移的相互作用下，城市已出现明显的社会分区。根据城市中心分移的理论假说，城市中心的分移需要一定的动因、时机和条件，在以上三者同时具备的情况下，单核心城市中心的分移过程要和人口流动的过程等因素相结合，地方政府因势而利导之，方可带动城市空间结构的优化。

The Chinese urbanization enters rapid increasing period, the academic circles has done many research to the spatial development pattern for coastal cities in eastern part, but it has not done many research to the changing spatial structure of undeveloped especially big cities regarding the mid-west . In inspecting the spatial structure variations of domestic and foreign big cities, this article utilizes the first investigation materials and the fourth, the fifth national census data aimed at experimental study about the spatial structure evolution of Nanning city after 1990. Taking ecology boundary as the restraint condition, this paper divides the Nanning city central area into district office as the basic spatial unit, which separated from the social population, the industrial layout, the landuse and the transportation three aspects. The author compares the city spatial structure changes at the beginning of 1990 ages with which after 2000 under this three functions by using quantitative investigation method. Then considering the government policy influence to the city spatial structure, this paper synthesizes each factor＇s influence to the space for inspecting the evolution of Nanning city spatial structure. The author also deduces the evolution model of Nanning city spatial structure for the near 20 years, summarized its changing characteristics. At last this paper proposes the theory hypothesis about the city center “dividing-moving”, and compares it with the domestic and foreign correlations model. This article believes that from 1990 till now, under many kinds of influences regarding natural flows of the population, the government policy, the land development and the industrial layout change and so on, the Nanning city center has experienced the process of “dividing-moving”. The city spatial structure has already evolved from single core pattern to two cores pattern. These two cores connects with one axial district. Because of the population flowing, the city has appeared the obvious social district. According to the hypothesis about city center “dividing-moving”, the city center＇s dividing-moving needs certain motivation, opportunity and condition. Just only this three factors simultaneously occur, the process of city center “dividing-moving” should connected with the population moving process. Then following this condition, local government can push the city spatial structure to the optimization.