It was based on TM remote sensing image during three periods of 1979

1990 and 2004 in Dumeng country

northeastern province. It uses GIS technology as the data integration analysis platform and obtains land utilization information in different periods of 20 years and conducted the land-use. An ecological risk index was constructed based on the land-use structure; The semivarogram analysis and the system sampling method was used to make it a spatial variable; the block Kriging were conducted to study the spatial characteristics and inherent causes of regional ecological risk in the working area and we put forward the protective measures in high ecological risk areas in Dumeng County.