Abstract: In order to meet the requirements of the rigid constraint of water resources, and effectively ensure the safety of urban agriculture, domestic and production water, we analyzed the water-saving potential of Suqian City, Jiangsu Province under different planning years and water resources conditions.The total water consumption control management is an important standard for implementing the rigid constraints of water resources.In the process of calculating the water-saving potential, the "basic plan" and "water-saving plan" were set based on the water-saving goal and intensity.With the regional total water consumption control index as the constraint, a water-saving potential model based on target control was constructed, and the water-saving potential of Suqian City in the planning year was analyzed from three modules of agriculture, secondary and tertiary industries, and living use.Results showed that after adopting the "water-saving plan",Suqian City can basically met the balance of water supply and demand, and only Shuyang County is in a state of mild water shortage under the condition of 95% water frequency.The water-saving potential of Suqian City can reach 750.69 million m3 and 692.93 million m3 in 2025 and 2030 respectively, under the condition of 50% water frequency.Shuyang County has the greatest water-saving potential among the two districts and three counties in Suqian City.In the future, the total amount control and management of Suqian City should be planned reasonably to fully tap the water-saving potential.The research results can provide reference for the development of regional water-saving potential.