Based on field experiments of the saline water irrigation which have been conducted in the Hongwei Water Saving Demonstration Plot in Inner Mongolia Autonomous Region, SWAP(Soil-Water-Atmosphere-Plant) model developed by Wageningen Agricultural College was used as an analyzing tool. The parameters in the model were calibrated with the data of this saline-water irrigation experiment. Then, different irrigation schedules of saline-water irrigation based on the different irrigation rations, the different irrigation times and the different irrigation types were simulated and the results were analyzed, the optimal irrigation schedule was selected.