Abstract: With the accelerating pace of urbanization, more and more building foundations appear in hilly areas of loess plateau. Building foundations can have serious uneven subsidences because of large pore loess and special landform, which can lead to crack, or even collapse of buildings. The crustal stress, water content and foundation sedimentation of loess hilly-gully high-stacked foundation are studied via in-situ monitoring. The changing law of filled foundation's water content with season and the affected depth are analyzed. It is found that there exists a soil arch in high-stacked foundation. The relation between sedimentation and filling depth is concluded. The final sedimentation volume is analyzed and conjectured by the use of three-dimension numerical simulation inversion. The foundation deformation law under the effect of upper construction is predicted which provides reference for similar loess high-stacked engineering design and its deformation calculation.