Using differential method,the independent character of three common interface value relation is eiscussed in electromegnetic field,and the physical essence of new conclusion is introduced.

• 关于定态电磁场边值关系的独立性问题,一般教科书上只给了结论,没有进行数学推导,个别教科书上只就两种绝缘介质的分界面用积分的形式进行了推导,本文拟用微分形式将三种常见的分界面的边值关系的独立性问题进行讨论,并阐述所得结果的物理根源。