Abstract: In order to study movement law of water and salt in soil, the author investigated the characteristics of the water flow and salt transport under different irrigation amount by the laboratory soil column experiments. In accordance with the saturated- unsaturated soil water movement and solute transportation theories, mathematical model was built and the transport of soil water and solute was simulated by HYDRUS- 1D to study the soil water and salt migration mechanism. The model was verified using the data of laboratory experiments. The results showed that with irrigation water of 1.4 L, 2.8 L and 4.2 L, salification zone depth were 20 cm, 30 cm and 40 cm, respectively, and the rate of accumulated salt was 49.2%, 57.6% and 100%, respectively. Desalinization ratio in the surface layer of soil was 87.2% , 93.7% and 96.8% , respectively. Salification zone depth was at above 5 cm the wetting front. The transport of soil water and solute could be better simulated by HYDRUS-1D.