[Objective] The change regularity of soil water and salt in the farming period was analyzed to improve the present irrigation method in order to provide scientific guidance for salinization control, and to test the impacts of water-saving irrigation on ecological environment.[Methods] Observation sites and test points were selected according to indices of soil texture, irrigation method, crop cultivation and other factors. After two years of observation and test, changes of soil salinity in profiles were calculated and analyzed, and the regularity patterns of desalination and salinization were identified(normal, inverted, even and concussion type). The correlations among the impacting factors of movement regularity as ground water level, preliminary salinity and rainfall were analyzed.[Results] Trend of normal accumulation strengthened in unirrigation or less irrigation area. Surface soil salinity changed as early as in the preliminary stage of irrigation, for example, 10 days after irrigation, soil salinity was observed beginning to rise. Soil salinity had greater than that before irrigation activities(or before rain). Soil in survey area(except of wasteland) were observed in desalination state during cultivation period, and the soil salinity decreased regularly with time.[Conclusion] Soil in wasteland was observed in a normal salinity state, and enhanced surface accumulation of salinity was observed at sections with no or less irrigation. Rates of desalination in districts where were irrigated using well with low ground water level were faster than those in canal irrigation areas with high groundwater level.