Ｇｏｏｄｍａｎ教授提出的节理单元模型被广泛地应用于岩石力学与工程实践。然而该模型的分析精度却依赖于对节理的法向刚度ｋｎ切向刚度ｋｓ的准确确定。但这项工作在实验室几乎是不可能的。文中提出了一种在现场利用声波测试ｋｎ和ｋｓ的方法，并讨论了影响ｋｎ、ｋｓ测试精度的因素。 Professor Goodman proposed joint element model is widely used in rock mechanics and engineering practice. However, the analytical accuracy of the model relies on the accurate determination of the tangent stiffness ks of the normal stiffness kn of joints. But this work is almost impossible in the laboratory. In this paper, a method of using acoustic wave to test kn and ks in the field is proposed, and the factors that affect the testing accuracy of kn and ks are discussed.