Abstract: Sandy land of the Northeast China Plain lies in the eastern fringe of huge sandy belt of mid latitude in Eurasia. Using RS and GIS, the index of desertification degree is established to detect the dynamic change of desertification based on NOAA/AVHRR data, and the modern modes of desertification are studied based on TM data According to the statistics, the light desertified land decreased from 38 216 3 km 2 in 1990 to 26 452 2 km 2 in 1997, and severe and very severe desertified land increased from 3268 2 km 2 and 3 511 9 km 2 in 1990 to 4 887 3 km 2 and 5 966 4 km 2 in 1997 respectively. The ratio of reversion desertified land, the ratio of development and the ratio of steadiness accounted for 7 7%, 39 9% and 53 4% respectively The modes of desertification include the moving accroachment of the quicksand to the farmland or grassland, sheet like enlargement of quicksand in grassland and farmland, patch like enlargement of quicksands on sand ridges around residential areas, wind erosion in farmland and grassland and sand covering on the ground Sandy lands for combating desertification can be divided into sub regions including where people removing out to abate the pressure of population, adjusting the distribution of residential areas, restricting the overgrazing.

Key words: West of Northeast China Plain, sandy desertification, dynamic of sandy desertification, driving forces, modes of sandy desertification, countermeasures combating desertification