This paper, based on the structural changes during urban construction land expansion in Jiangxi province during 1991 to 2008, applies Lorenz curves and Gini coefficient to analyze the spatial differentiation in 2000 and in 2008. The results show that the total areas of urban construction land in Jiangxi province are linearly increased from 1991 to 2008 by 36 km2 annually. The productive land is decreasing, and the land for services and living is increasing. In 2000, the distribution of the land for residence, public facilities, industry, street and square were more evenly; the land for warehouse, greenbelt and transport were rather evenly; the land for utilities was relative reasonable. In 2008, the distribution of the land for residence, street and square were more evenly; the land for utilities, transport, warehouse, greenbelt, industry and public facilities were rather evenly. The most imbalanced land type was for specific use in two periods (while Gini coefficient was above 40——the international alert line). The distribution scattering degree of the land for residence, public facilities, industry, street and square and specific use is growing, the land for warehouse, transport, utilities and greenbelt tends to the equilibrium.
