Abstract: Land desertification type maps of every periods were drafted based on TM images and spatial data base constructed with the supporting of GIS. Then the land desertization trend figures of a new type are formed through the overlay manipulation. According to the information obtained from these trend figures, the development analysis and prediction study show that the both the situations of ecology, recovering through desertization control and worsening through destroying by human being, exist in Yulin prefecture, which is located in the crisscross belt of agriculture and husbandry and the worsening is superior to the recovering. As this, the authors of this paper indicate that more attention should be paid to the comprehensive control of this area and many powerful measures must be adopted timely.