Abstract: In order to measure the stability of the instrument and the consistency of the observation data, specific technical index values will be set for constraint during the compilation of technical comparison specifications of geoelectric observation instruments. In order to verify the rationality of the set value of the technical index, the geo-electric field meter and DC georesistivity meter were used to compare the observed data, and the technical index value was calculated according to the method in the specification. it is concluded that the specific technical indicator values in the comparison test specification of the geoelectric observation instrument are reasonable. This study provides basis and support for the comparison test specification of the geoelectric observation instrument and the comparison of geoelectric observing instrument stations, so as to standardize geoelectric observing instruments and produce high-quality geoelectric observation data for earthquake monitoring.