With the increasing scarcity of water resources,it is becoming difficult to use hydraulic engineering measures to regulate salt balance in irrigation districts.Bio-desalination method is of great importance to improve salt balance regulation in irrigation districts where drainage systems are lacking.In this study,we conducted field experiments by using halophytic vegetation in the heavily salinized soils in the agricultural development region of Karamay City.Based on the principle of salt-water balance,the salt content in irrigation water and the amount of bio-desalination of the halophytic vegetation were calculated,and an equation for salt balance regulation was established.Our results indicated that Atriplex aucheri and Suaeda salsa were two ideal options for bio-desalination.The aboveground biomass of Atriplex aucheri was 27 040.4and 25 620.0kg/hm² in 2009and 2010,respectively,while the ash-free dry weight of Atriplex aucheri after clipping was 7 618.6and 7 019.5kg/hm² in 2009and 2010,respectively.The corresponding amount of biodesalination was 7.8and 7.2times of the amount of salt introduced by irrigation water,respectively.As for Suaeda salsa,the aboveground biomass was 18 836.4and 19 119.3kg/hm²;while the ash-free dry weight was 5 258.0and 5 185.0kg/hm²,respectively.The corresponding amount of bio-desalination was 5.4and 5.3times of the amount of salt introduced by irrigation water,respectively.We concluded that,bio-desalination using halophytic vegetation will be an important approach to salt balance regulation in irrigation districts where drainage systems are lacking