Moisture physical constants,soil water characteristic curve and specific water capacity of three Caragana Fabr.in typical planting years were studied by contrasting slope plantations and waste hillside fields.Results showed that Caragana Fabr.physical clay content of soil was less influenced,and soil bulk density was improved obviously within 50 years of plantation.Through comparing with soil's holding and supplying water capability in different plantation years,an obvious trend of 46 a Caragana Fabr.30 a and 21 a Caragana Fabr.slope plantationswaste hillside fields was found.Therefore,Caragana Fabr.plantations may promote the development of soil and improve soil holding and supplying water ability.