东北黑土区水土流失对区域生态环境及经济的可持续发展造成了严重的危害，主要表现在剥蚀表层土壤，随着黑土层厚度的降低，土地的生产能力下降。本文根据黑土层厚度的不同将土壤侵蚀划分为三类：轻度侵蚀、中度侵蚀、重度侵蚀。通过分析比较三类土壤不同深度（0-60cm）的土壤物理性质和土壤水分特征曲线，得出结论：轻度侵蚀的土壤持水性整体较好，中度侵蚀的土壤次之，重度侵蚀的土壤持水性较差。

The water and soil loss of the northeast black soil zone，which cause a serious damage to regional ecological environment and sustainable development of the economy and shows that the surface soil ablation.with the lower layer thickness of black soil, land production ability decrease. In this paper, black soil will be divided into three kinds of soil erosion according to the different thickness:mild erosion，moderate erosion，and severe erosion.Through the analysis and comparison of three different kind soil depth (0 to 60 cm) of soil physical properties and the soil moisture feature curve, draw the conclusion: the water holding capacity of the mild erosion is higher,the moderate erosion is second,and severe erosion is poor.