Abstract: Based on the land utilization maps of 1996， 2002， 2009， this paper analyzed the spatial differentiation and resources of the construction land expansion and driving forces， with Mapgis6.5， Arcview3.3 and SPSS11.5， in two successive phases from 1996 to 2002， 2002 to2009. The results showed that the expansion speed of townland， traffic land and special land use in the recent period was quicker than the early period， on the contrary， the rural residential area， independent land used for industry and mining was declining. The resources of the construction land expansion came from all the other land use types， and contributive rate of farmland was 61.40％ that was the highest. The pattern that the expansion level of Chaobai riverfront and western district is higher， while the expansion level of eastern district is lower. The three cluster centers appeared were Tianzhu， Houshayu and Nanfaxin airport economic circle in southwestern area， major towns of Zhaoquanying and Gaoliying in northwestern area， and Olympic Business Circle in the middle and upper reaches of Chaobai River. The main driving forces of the high level expansion region were in sequence of per capita net income， output value per hectare of the enterprises of villages and small towns， urban-rural income disparity; the main driving forces of the middle level expansion region were in sequence of urban-rural income disparity， population density; the main driving force of the low level expansion region was urban-rural income disparity.

Key words: suburban areas of big city, construction land, expansion, resources, spatial differentiation, driving force