Based on the LANDSAT-TM images in 1987,1996 and 2008 years and the present land use maps (1∶10 000) of Qianlianghu polder in Dongting Lake region and by applying to GIS technologies and FRAGSTATS analyzing software,landscape pattern dynamic changes of Qianlianghu polder were analyzed on the patch type and landscape scales,and its driving forces were further analyzed through establishing the transfer matrixes and calculating transfer contribution rates in last more than 20 years.The results showed that landscape element types changed significantly in Dongting Lake region from 1987 to 2008,which were proofed wholly by area continuous decreasing in the types of dry land and garden plot,area continuous increasing in the types of water,paddy field,road and building land,and for the woodland area were firstly decreased and then increased.The overall changing trends in landscape patterns of Qianlianghu polder were increased in diversity,evenness,and degree of fragmentation,and became complexity in the shapes of landscape.The three main driving forces for landscape pattern changing were population increase and urbanization construction,industrial structure adjustment,together with the project implement of converting polders back into wetlands.