“电磁场”是高中物理电磁学中的重要概念 ,其中“变化的电场产生磁场”和“变化的磁场产生电场”是麦克斯韦电磁场理论的两个支柱 ,但内容比较抽象 .学生因为缺乏这方面的感性认识 ,觉得不好理解 .因此 ,精心设计 ,想方设法做好与此相关的演示实验就显得十分必要 ,本文拟探讨 “Electromagnetic field” is an important concept in high school physical electromagnetism, in which “changing electric field to generate magnetic field” and “changing magnetic field to generate electric field” are two main pillars of Maxwell’s electromagnetic field theory, but the content is more abstract. Students lack sensitivity in this respect. It is very difficult to understand and think it is difficult to understand. Therefore, it is necessary to carefully design and try to do a good job in this related demonstration experiment.