The results show that the observation data of lead electrode are consistent with that of non-polarizable electrode in short period, and the stability of the data from deep burying lead electrode excels solid non-polarizable electrode, and its inherent quality also excels shallow burying lead electrode. 深埋铅电极的大地电场观测资料在长期稳定性上优于固体不极化电极;而观测数据的内在观测质量也高于浅埋铅电极。