[Objective] This study was aimed to estimate the amount of water conservation in Shaanxi Province. [Methods] The InVEST model and PLUS model were coupled to calculate the water conservation amount in Shaanxi Province from 2000 to 2020 and predict the water conservation amount under land use changes in the future in 2030. [Results] The average water conservation amount in Shaanxi Province from 2000 to 2020 was 132.25 mm, with a spatial distribution characteristic of gradually increasing water conservation from north to south. From the perspective of vegetation types, forest land was the main body of water conservation in Shaanxi Province. The average annual water conservation amount was 199.55×10⁸ m³. From the administrative region, Ankang City had the largest water conservation amount(308.96 mm). The total amount of water source conservation in 2030 will be 285.16×10⁸ m³ and 8.68×10⁸ m³ less than that in 2020. [Conclusion] The water conservation amount of Shaanxi Province will show a slight downward trend from 2020 to 2030 in the future.