In order to maintain the sustainability of Tarim Desert Highway shelterbelts

the change of soil water-salt environment of the outer edge of the shelterbelts in a complete irrigation cycle was monitored.Results showed that(1)soil water content on the outer edge of the shelterbelts began to decline when irrigation finished.After the sixth day in the irrigation cycle

it gradually decreased within 90 cm outside of the outer edge and reached a basic balance beyond 90 cm outside of the edge.(2)Because of a comprehensive influence of saline water irrigation and evapotranspiration

soil salt outside of the edge was accumulated in soil surface and 120 cm soil layer and the accumulation decreased in root layer.(3)The relative change of slat content in groundwater on the outer edge presented a V-type change and the change was the weakest 90 cm outside of the edge.Groundwater parameters had a greater change with decreased distance to shelterbelts.