Parallel high-density sounding is a DC electrical technology based on distributed parallel intelligent potential difference signal acquisition method, which is different from the traditional single power supply single point measurement, the parallel high-density electrical method can realize the single point power supply multiple measurement points for data acquisition at the same time, and its efficiency is much higher than the traditional three-pole sounding. In this paper, the parallel high-density method was studied and compared with the traditional three-pole electrical depth measurement to reveal the advantages of the parallel high-density electrical method more effectively.