In the process of soil water movement, the soil water content in the surface layer of a sandy Boil changed firstly in the initial stage. In the duration of time, the layer in which the soil water content began to change gradually moved downward in the soil profile. After a certain time, about 12 minutes, such variation occured mainly in the middle part of the soil profile and changes either in the surface layer or in the bottom Payer of the soil profile were insignificant.The quantity and the rate of soil water movement were increased with the increase of difference in hydraulic potential. Owing to the different location of the slow permeable stratum in the soil profile, the rate of soil water movement varied significantly. The more shallow the slow permeable stratum was located in the soil profile, the less the quantity and the rate of soil water movement occured. The result of the experiment has shown that the use of radioactive isotope ¹³¹I for the study of soil water movement is a more convenient method with higher sensitivity, and its use also provides a possibility to observe the process of soil water movement continuously.