In this paper, a 2-D distributed hydrology numerical model,which based on the law of conservation of mass and the law of conservation of energy and the specialty of conflux in woody sloping field, was developed to describe the unsaturated-saturated groundwater flow in woody sloping field.The finite element method was uesd to simulate the process of the rainfall infiltration and the flow in soil.With the result,the specialty of flow produce and infiltration was analyzed.