Based on the statistics data and groundwater information

we analyzed the land use change and its effect on groundwater

by geographic information systems(GIS) and the Cobb-Douglass production function.As a typical agricultural county in the salinity transforming region

the results showed that the speed of LUC was slow and the farm lands

which changed into rural resident lands and town lands

was the key change type of land use transfer. At the same time

the multiple cropping index

irrigation area

grain yield and the rate of irrigation had been improved increasingly.The high dependency of crop and vegetable yield on irrigation was the key cause of the change of groundwater embedded depth.The exploitation areas of shallow and deep groundwater were respectively the balance area and the moderate overdrawn area by the dividing criterion of groundwater overdrawn area.It is necessary to adjust the structure of crop production

reduce properly the intensity of land use

develop the saving water agriculture in order to realize the regional sustainable use and water in the salinity transforming region.