The invention relates to an all-weather power-frequency electric field measuring device which comprises at least a power-frequency electric field probe unit, at least a noninsulated specially-made bracket, a handset unit and a PC (personal computer), wherein each probe unit is supported by a bracket; each power-frequency electric field probe unit is composed of a sensor, a signal processing circuit, a first SCM (single chip microcomputer), a first communication module, an A/D (analog to digital) chip and a first power module; the handset unit is composed of a second communication module, a second SCM, a display screen, an operating keyboard and a second power module; and the first communication module of each power-frequency electric field probe unit is respectively connected with the second communication module of the handset unit, and the handset unit is connected with the PC by the second SCM. The all-weather power-frequency electric field measuring device provided by the invention can be used in all-weather conditions, can eliminate the personnel-proximity effect caused by short lines in the process of measurement, and eliminate the influence of relative humidity on measurement results.