Abstract: In order to analyze influence of each operation in mining process on measurement of electromagnetic radiation, a test was carried out on working face in Changgouyu Coal Mine and electromagnetic radiation monitoring signals of each operation were analyzed quantitatively. The results show that online electromagnetic radiation monitoring signals are mostly influenced by electrical equipments such as winch, scraper conveyor and bell which are main interference resources, and less interferenced by non-electric operation such as pillar compression and personnel moving. The research provides reliable basis for eliminating influence of interference sources while using electromagnetic radiation critical value method to judge coal-rock dynamic disaster at field.