本文提出了一种在用数值法评价地下水资源时，处理区内河流与地下水之间转换关系的一种方法。该方法把河流处理为一系列节点，以计算的地下水位与河床标高的比较为控制条件，通过迭代法确定各河流节点的补、排性质及当为补给节点时，确定它的补给强度。最后通过实例说明这一方法。 This paper presents a method of dealing with the relationship between river and groundwater conversion when using numerical methods to evaluate groundwater resources. In this method, the river is treated as a series of nodes. Based on the comparison between the calculated groundwater level and riverbed elevation, iterative method is used to determine the complement and the nature of each river node. When it is a supply node, the supply intensity is determined. Finally, an example to illustrate this method.