中文摘要：

本文阐述了西北干旱区自然环境的基本特点，讨论了土地退化中土地沙漠化、土地盐渍化和草地退化问题。指出生态建设应当尊重自然，不宜大面积植树造林，采取生态修复措施和建立自然保护区有助于环境整治与生态建设。在区域发展中应当重视土地与水资源的合理开发利用以及区域间环境与发展协调等问题。

英文摘要：

The physico-geographical features, issues of land degra- dation, eco-reconstruction, utilization of water and land resources, as well as regional development in Northwest Arid Region of China are dealt with in the present paper. Main types of land degradation include sandy desertification, secondary salinization and grassland degradation. As concern eco-reconstruction human being should respect for nature, for example, tree planting and afforestation in a large scale are not suitable, to conducting measures such as eco-restoration and natural conservation are useful for environmental management. From the point of view of regional development, more attention should be paid to rational utilization and exploitation of water and land resources, as well as coordination and overall planning in development between various regions.