Abstract: In this paper, the LUCC in Xianyang City during the period from 1990 to 2007 was analyzed using the RS and GIS means and statistical analysis based on the remote sensing data of land use in the city in 1990 and 2007. On which the ecological risk caused by LUCC in the city was researched. The results are as follows: (1) Area of farmland and unused land was holistically reduced in recent 17 years, but that of woodland, grassland and land for construction was enlarged; (2) Ecological risk index was in an increase trend with land use change during the period from 1990 to 2007, and it was increased from 0.130 8 in 1990 to 0.131 9 in 2007. It is predicted that land fragmentation will become more serious with rapid economic development and urbanization, and the ecological risk in the city will be continuously increased in the future.

Key words: LUCC, ecological risk, Xianyang City, Shaanxi Province