Abstract: Landsat-5 TM images of 1990,2001,2006 and theforest resource distribution map of 1999 for Muchuan County were used as information sources. The supervised classification techique combined with the expert knowledge was used for classification with the accuracy reaching 81.42%,86.52% and 86.10% respectively.Besides,landscape analysis methods together with RS and GIS techniques were introduced for analysis of the LUCC (Land Use and Cover Change) of Muchuan County.The results demonstrated that farmland areas decreased gradually with the change of time.By 2006,farmland areas reached only 42.15% of the total study region.Bamboo forest had great change in forestry land from1999 to 2001.Newly planted bamboo forest from 1999 to 2001 had negative effect on landscape connectivity,and the fragmentized rate of landscape reached its maximum which strengthened the infiltration correlated with biological behavior or biological course.In those areas with high altitude,the project of farmland conversion to forestry land had less influence on farmland and the fragmentation of landscape got small.At the same time,human activities are main impacts on fragmentation of landscape in those areas at low altitude.

Key words: LUCC, project of conversion of farmland to forest land, landscape pattern changes, driving force