Based on the filed experiment in the projected Yangou watershed,Yan'an city, the soil water of 26 sits under different land use and land cover had been surveyed during April to Oct.The soil water content and soil water volume had been analyzed accordingly with the land use type by coupling land use data and soil gravity data,and also the effects of slope grade and altitude on the soil water content.The soil water of 8 types land use had been compared and systematically analyzed including slope arable land,terrace land,silt dam land,arbor forest land,shrub land,pasture land,fish-scale pot land,and narrow level belt land in 0~4 m soil layer.Under Arcview environment the soil water in 0~1 m,1~2 m,2~3 m,3~4 m,and 0~4 m layers of the watershed as a whole had been given monthly from April to Oct.The four scenarios of land use had also been compared to study the effect of land use change on the soil water resources in the watershed.The results could help the on going eco-environment project named "grain for green" in loess region.