Abstract: According to the obvious differences of resistivity between major rocks and ore bodies, the magnetotellic method was em?ployed in the Yanjiagou gold deposit of Huailai County, Hebei Province. In this paper, the authors processed and analyzed the data col?lected in the study area by some precision instruments, and constructed the resistivity gradient profile model. On such a basis, some low-resistivity zones were detected, which accorded well with the result of drilling exploration and high precision magnetic survey. Some anomalous belts of low resistivity were found in the surveyed area, which are distributed at the depth of or near western site 11, south?ern site 54 and eastern site 21 and are considered to be places favorable for minerization. The study results provide useful geophysical information for prognosis of concealed orebodies in covered areas.