以土壤物理基本定律为基础，建立了结冻、未结冻、饱和、非饱和土壤的水热盐耦合运动通用模型。该通用模型可简化为土壤水或热运动的单一模型。通过二维有限元数值解、一维模拟程序的编制和计算预测，与内蒙河套长胜渠杨树壕试验点在１９８８年秋～１９８９年春期间耕层积盐过程实测值对照，模型得到初步验证及应用。 Based on the basic laws of soil physics, a general model of coupled movement of water, heat and salt in frozen, non-frozen, saturated and unsaturated soils was established. This general model can be simplified as a single model of soil water or thermal motion. Through the two-dimensional finite element numerical solution and the one-dimensional simulation program compilation and calculation and prediction, the model was compared with the experimental data of Yangshuhang test point in Hetao Shengtou of Inner Mongolia between the autumn of 1988 and the spring of 1989, application.