In semi-arid of the Loess hilly and gully region, the precipitation is the main limited factor for vegetation growth. The fish-scale pit has been popularized as one kind of runoff catchment measure. In order to study the catchment function of fish-scale pit in rainy season, continuous monitoring of soil moisture was carried out on the typical spots. The results showed that during July and August, the average soil water contents inside the fish-scale pits were below the levels of external slope; the 20-40 cm soil layer in the fish-scale pits was the main use of soil water, and the 40-60 cm soil layer was the main runoff catchment; the effect of each fish-scale pits was different, which was mainly in the runoff periods. As a result, the catchment effect of each fish-scale pits was influenced by layout mode, construction technology and other factors.%在黄土高原半干旱地区,降水是限制植被生长的主要限制因子.鱼鳞坑作为一种集水措施在人工造林中被普及推广.为研究鱼鳞坑雨季的集水功能,对样地鱼鳞坑内部、上部及侧面坡面典型部位的土壤水分进行了连续性监测,结果显示:7-8月,鱼鳞坑内的平均土壤含水量维持在低于鱼鳞坑外部坡面的水平；鱼鳞坑内20～40 cm土层是土壤水分的主要利用层,鱼鳞坑的集雨效果表现在40～60 cm土层上；单个鱼鳞坑的集雨效果存在差异性,这种差异性主要表现在有径流产生的降雨期.单个鱼鳞坑的集雨效果受鱼鳞坑的布置模式、施工工艺等因素的影响.
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