Water and salt management in the Hetao Irrigation District in Northwest China was studied using the SAHYSMOD model. Different water-saving practices were analyzed to see their effects on water and salt dynamics. The model predicted that reducing water diversion by 15% could save up to 650 million cubic meters of water per year. Soil salinity in some areas decreased slightly, while in others it increased significantly over the next 10 years. To save water effectively, reducing field irrigation quotas and improving canal water efficiency are key measures. Overall, a comprehensive analysis is needed to determine the best water management strategy for the district while considering ecological water needs.