The invention discloses a direct current electric method ground hole detection method and device. According to the direct current electric method ground hole detection method and device, ground large-current power supply is achieved, stable and symmetrical point power supply fields are built, and single-point electric potential is directly received during underground hole drilling. A hole is drilled in an underground target stratum which needs advanced detection, two power supply electrodes are distributed at the two ends of the drilled hole and distributed at the corresponding drill projection ground positions, the two power supply electrodes and a ground infinity electrode form power supply systems respectively, the power supply systems supply power underground in sequence, and a manual field source is built; one receiving electrode is arranged in the underground drilled hole, the other electrode is arranged at the infinity position, the two electrodes are connected with the electrode M and the electrode N of a receiving device respectively, and a receiving point power supply field in the hole receives the electric potential generated at the electrode position; two sets of electric potential data are obtained finally, the electric potential data serve as basic data to conduct combined treatment, and the data body capable of being used for geological interpretation is obtained.