Soil water infiltration is an important link of the natural water cycle. Infiltration is the inherent properties of soils. It determines the speed and distribution of the irrigation water converted to soil water. Then affected the irrigation’s quality and effect. Especially for high saline soil infiltration of improvement has profound significance. Gypsum improving is a chemical measures to improve high saline soils and has a remarkable effect on soil water infiltration. It can improve saline land with the help of other measures.