By using the method of combining the investigation and remote sensing date, base on the fixed situation, use manner, desertification degree and land desertification degree index of the desertification land, the structure and dynamics of desertification land in Chifeng city during 1994 and 2004 were studied comprehensively. It is show that total desertification land area and the land with obvious desertification trend is 1 914 982.6 hm^2 and 1 029 690.3 hm^2, 22.2% and 11.9% of the total area of Chifeng city respectively. From point of fixed situation, shifting sandy land, half-fixed sandy land, fixed sandy land, exposure sandy land and desertification cultivated land is 7.8% ,10.1% ,80.5% ,0.5% and 1.1% respectively. From point of use manner, desertification cultivated land, desertification forest land, desertification grassland and unused desertification land is 1.1%, 24.8%, 65.8% and 8.3% respectively. From point of desertification degree, light desertification land, middle desertification land, serious desertification land and super serious desertification land is 46.4%, 35.2%, 10.1% and 8.3% respectively. The land desertification degree index range of different counties varies greatly, Hongshan district is 0, Wengniute county is 22.45. During 1994 to 2004, the desertification land of Chifeng city reduce 748 797.3 hm^2, reduce 28.1%. Fixed sandy land increase 5.6%, half fixed sand reduce 47.4%, shifting sandy land reduce 24.8%, exposure sandy land increase 223.7 % and desertification cultivated land reduce 96.7N. The land desertification degree index reduce 23.20%, the most is 100 % which take placed in Hongshan district where no sandy land present now, and the lest is 4.8 % and 6.9 % which take placed in Keshiketeng county and Wengniute county.