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       According to the general technical idea of "sand control and self restoration", the ecological sand control mechanism of "water and fertilizer conservation, air permeability and oxygen enrichment, heat insulation and steam prevention, micro moistening and moisture conservation" is proposed. The desert body material air permeability and impermeable sand (blanket) is used to improve the soil structure, redistribute the water and fertilizer transport path, increase the content of organic matter, and build an "ecological planting basin" for water and fertilizer conservation, Promoting the coupling effect of "water fertilizer air heat" and artificially creating a green planting environment in sandy land can not only solve the planting problems of water, fertilizer and moisture conservation in sandy land, but also solve the problems of rejection reaction and environmental pollution caused by laying plastic lining film, sand fixing agent, modifier and other objective materials in sandy land, which provides innovative technical support for the construction of green ecosystem in desertification land.