本文简要介绍了离子选择电极、氧化还原电位(Eh)等电化学分析方法的原理、测试技术。並以1980年甘肃闾井3.4级地震取得的现场观测资料说明,氟离子、硝酸根、Eh等项目在地震前有较明显的前兆反应。以离子选择电极为主的电化学分析方法具有所需仪器设备较少、测定手段简便、便于现场实地观测、易于实现连续自动化等优点。是水化多项观测的切实可行的方法,必将在地震预报的研究中发挥一定的作用。 This article briefly introduces the principle and test technique of electrochemical analysis methods such as ion selective electrode and redox potential (Eh). The observation data obtained from the Ms 3.4 Luxu earthquake in Gansu Province in 1980 shows that fluoride ion, nitrate ion and Eh have obvious precursors before the earthquake. Electrochemical methods based on ion-selective electrodes have the advantages of less required equipment, simple measuring means, easy on-site observation and easy to realize continuous automation. It is a practical method for hydration observation and will surely play a certain role in the study of earthquake prediction.