The soil water content is an important mark of the soil quality. It affects not only the physicochemical properties hut also distribution and absorption of mineral nutrients of plant, and at the same time it has the influence on the change of soil heat flux. The drying method and cutting-ring method were used to determine the physical properties of soil, and emphasis was to know the change of 0 - 40cm soil water content under different vegetation types in this area. Through determining soil water content in April, July, September and November, the results showed that the soil water content reached maximum value in September under the same vegetation types except the shrub land, and displayed positive correlation with the rainy season of this area, under the shrub land it continued to increase from April to November in 2007. In the same month,the status of soil water content under different vegetation types was： secondary forest 〉 Populus mixed with Salix 〉 shrub land 〉 needle-broad leaved mixed forest 〉 black locust forest 〉 steep waste land 〉 fiat waste land 〉 Cupressus chengiana forest, but in September and November, the soil water content under the shrub land was more than that under the other vegetation types.%采用烘干法和环刀法对土壤物理性质进行了测定，目的是为了重点了解岷江上游山地森林／干旱河谷交错带的不同植被类型下0～40cm土壤含水量的变化。经过2007年4月、7月、9月、11月四个不同时期的测定，结果表明：同一植被类型下（除灌木林地）土壤含水量9月份的最大，与当地的雨季呈现同增同减的关系，而灌木林地下的呈现从4月到11月的持续增加的变化。在同一月份中，不同植被下的土壤含水状况为：次生林地〉杨柳混交林地〉灌木林地〉针阔混交林地〉刺槐林地〉陡荒地〉平荒地〉岷江柏林地的变化关系，但是在9月和11月中，灌木林地下的土壤含水量却又远远高于其他植被下的土壤含水量。
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