Based on GIS and landscape pattern theory,dynamic landscape pattern of land use and soil and water loss in the Ertan Reservoir area of Yanbian County were analyzed using translated data from remote sensing images in 1988,1999,and 2003.Results showed that the area percentage of farmland decreased obviously,while the percentage of woodland,bush-land,and grassland increased.The patch number of farmland increased and its mean patch area and patch density decreased.The patch number of woodland decreased,its mean patch area increased,and its patch density decreased.The patch number of grassland and its mean patch area increased and its patch density decreased.The AWMSI of farmland,woodland,bush-land,and sparse forestland decreased slightly and its patch shape became simple.The AWMSI of grassland increased and its patch shape became complicated.In view of the land-level,the general characteristics of landscape pattern change were that the patch number and patch density increased,while the mean patch area and LPI decreased,indicating an increase in fragmentation degree.The CONTAG decreased,while IJI increased,implying an enhanced connectedness of landscape.Landscape diversity and relative land use rationality index increased,indicating that an improved land use structure.Soil and water loss status in the Ertan reservoir area of Yanbian county was improved greatly from 1988 to 2003.