Abstract: 【 Objective 】 To study the desalination effect of different salinization improvement measures combined with agricultural measures on soil profile salinity and 0-80 cm tillage layer, in the hope of providing theoretical basis for sustainable utilization of resources in severely salinized soil. 【 Method 】 Three improvement schemes (T1, agricultural improvement measure, T2, root zone isolation soil salinity + agricultural improvement measure, T3, underground drainage treatment + agricultural improvement measure) were set up to study the salinity distribution and salinity content change in 0-80 cm soil profile through three years of field experiments. 【 Result 】 Groundwater burial depth of different improvement measures showed similar change regularity with irrigation in growing period. Underground drainage measures had better regulation effect on groundwater burial depth. The combination of root zone isolation, underground drainage measures and agricultural improvement measures could rapidly and effectively reduce soil salinity, and the bottom layer of root zone isolation measures. (40-80 cm) Soil desalination effect was stronger, and the salt content was reduced by 8.92 g/kg, and the salt content of the surface soil by 6.30 g/kg by the underground drainage measures. Agricultural improvement measures had a relatively low overall salt content reduction in the plough layer (40-80 cm). Combined with the three-year desalination rate,the desalination rate was lower in 2016. In 2017, the desalination rate in the study area increased significantly. The average desalination rates of the cultivated layer (0-80 cm) were 63.30% and 52.47% respectively, which were significantly higher than that of the agricultural improvement measures (30.67%). In 2018, the desalination rates of the agricultural improvement measures, the root-zone isolation measures and the underground pipe measures were significantly higher than those of the agricultural improvement measures (30.67%). The desalination rates of drainage measures in 0-80 cm soil layer were 5.28%, 20.00% and 3.89%, respectively.【 Conclusion 】Root-zone isolation and underground drainage engineering combined with agricultural improvement measures can rapidly and effectively reduce soil salinity and improve the severely salinized soil.