用ＤＰＪ－Ⅲ、ＵＬＦ－Ⅲ及ＪＤ－０３型电磁辐射仪观测到的资料，分析了山东苍山１９９５年５２级地震前多数台站记录到的异常信息及特征。发现其波形有锯齿、脉冲、波动等多种形式，异常出现的时间多在震前９ｄ～１５ｄ，并具弱—强—弱的规律，变化量可达５０×１０３ｓ·ｍｖ／ｍｍ左右。指出，较大地震前电磁辐射会发生异常，因此作为监测地震前兆的项目是可行的。 According to the data of DPJ-Ⅲ, ULF-Ⅲ and JD-03 electromagnetic radiometer, the anomaly information and features recorded by most stations before Cangshan, M5.2, 1995 are analyzed. It is found that the waveforms are sawtooth, pulse, wave and other forms. The anomalies occurred mostly 9d ~ 15d before the earthquake, with the weak-strong-weak rule, with the variation up to 50 × 103s · mv / mm. Pointed out that the larger the electromagnetic radiation before the earthquake will occur anomalies, so as a precursor to monitoring the earthquake project is feasible.