The effect of different leaching water volume on the soil water and salt movement of takyric solonetz under applying desulfurization gypsum was carried out by soil column leaching experiments in laboratory in this study. The results indicated that under applying desulfurization gypsum, the depth of wetting front with the amount of infiltrating water increased, and it showed linear relationship between them. Soil pH,exchangeable sodium percentage（ESP）and the total salt content in 0~20 cm soil layer dropped sharply . Under continuously leaching condition, the maximum desalt depth lied in 40~60 cm soil layer. In 0~40 cm soil layer, soil desalinization rate with the amount of infiltrating water slowly increased, and in 0~20 cm soil layer, the soil desalinization rates of treatment 1,treatment 2,treatment 3 and treatment 4 were 79.72%，89.88%，91.93% and 92.22% respectively. With the amount of leaching water increasing, the order in which the major ions in 0~20 cm soil layer was desalted from easy to difficult was Mg2+＞Cl-＞SO2-4＞Na+＞ HCO-3, and the rate of desalt of Mg2+ was up to 100% The order in which the major ions in 20~40 cm soil layer was desalted from easy to difficult was Na+＞Cl-＞Mg2+, and the rate of desalt of Na+ was up to 91.42% The content of HCO-3 and SO2-4 first increased, then reduced. Na+, Cl-and Mg2+in 0~40 cm soil layer had better leaching effect with the increasing of leaching water volume.