Abstract: Taking the acceleating urbanized Guilin city as an example, and using Landsat images as data sources, three indexes were constructed which were normalized different vegetation index(NDVI), normalized different built-up index(NDBI) and normalized different water index (NDWI). The information of construction land from 1991 to 2013 was extracted by false color composite and supervised classification method. In addition, the spatial-temporal feature of construction land in Guilin City during the 22 years was analyzed by using ARCGIS software. The results showed that the construction land areas and expansion intensity index of Guilin City increased distinctly with the development of urbanization. Whether from the spatial relationship of construction land angle, different districts, direction, the buffer or topographical conditions angle. The construction land expansion of the later period (2006-2013) is faster than those of earlier period (1991-2006). With the continuous development of urbanization, the construction land expansion of high-tech industrial zone and industrial park in the suburbs, Yanshan university town and satellite towns in the outer-suburbs have become hot spots.

Key words: urbanization, construction land expansion, remote sensing, Guilin,China