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In this paper, the abnormal event records of Beijing Geoelectric Field Observation Network (BGFON) from January 2015 to December 2020 are processed and analyzed. Based on the data tracking and analysis, it is concluded that the typical disturbances of BGFON include observation system failure, natural environment impact, site environment impact, man-made interference, geophysical event and unknown disturbance. The site environment disturbance has the most serious impact of BGFON, covering 75% of BGFON. The main influencing factors of site environmental disturbance include urban rail transit, pumping irrigation, equipment leakage, engineering influence, and high voltage direct current transmissionpower transmission. Underground deep well geoelectric observation is an effective way to reduce site environmental interference. The research results will help to improve the data observation quality of BGFON, and provide better supportfor earthquake prediction research.