In the ecological management of degraded sandy grassland, we put forward the mode of "using land to nourish land", which mainly uses a small amount of land and modern technical means to improve the efficiency of land use, improve the material life and quality of life of the community, and vacate a large amount of land to "recuperate" and realize the restoration of degraded grassland with the help of natural forces [9, 10]. Its practice is also very simple, that is, in places where water, electricity, fertilizer, transportation and technology are guaranteed, a small amount of production and lifestyle can be adjusted efficiently. A large number of degraded land will be released for enclosure and further developed into protected areas. The ratio of land used to land restored naturally can be 1: 100. This is because the biological productivity of degraded ecosystems is generally low at present. For example, the grass yield on degraded grassland is only 30- 100 kg/mu (fresh weight, the same below), while the feed yield can reach more than 6000 kg/mu after certain technical measures. The scientific basis for this is that the intensive land based on water and fertilizer security will not be degraded, and the agricultural civilization of the mainland has not declined for 5000 years, mainly because the land there has not been degraded. In grassland areas, it is very important to protect soil from wind. In fact, this knowledge existed as early as the Western Zhou Dynasty in China. For example, in the Book of Changes, there is a conclusion that "everything is based on soil" and "every valley is beautiful". Unfortunately, in today's advanced modernization, this simple truth is hard to attract people's attention. "