In order to clarify the soil moisture characteristics of grassland in the loess region of northern Shaanxi and its response to seasons,this paper selected the grassland of Jinfoping Watershed in Wuqi County as the research object,and analyzed the soil moisture characteristics of grassland in the research area by using positioning monitoring method. The results showed that:1) there were significant differences in soil moisture content in different seasons (P<0.05),and the general pattern was spring>autumn >summer. 2) The soil water content of grassland had obvious fluctuation with the seasons,especially in the 0~100cm soil layer,and the change was small and relatively stable below 100cm soil layer. The drying intensity of grassland soil in different seasons was light drying,and the drying index ranged from 0.21% to 1.03%. 3) The deficit degree of water storage in autumn showed a trend of first increasing and then decreasing,and gradually decreased with the increase of soil depth,while the deficit degree of soil water in spring showed a trend of fluctuation decreasing and tended to be stable with the increase of soil depth. 4) The precipitation supplemented the soil moisture of the grassland below 100cm,and the performance of different slope direction and slope position was different.