Kaifeng depression, located in the southeast corner of the JiyuanKaifeng depression, is enriched with deepseated groundwater sources. The rich geothermal water rock (thermal reservoir) commonly has lower resistivity than the insitu rock, and the reduction degree of its resistivity is related to the extent of water content, water temperature and mineralization. Based on geoelectrical anomaly, the authors inferred the distribution of the thermal reservoirs. A study of the magnetotelluric sounding method (MT) shows that the resistivity values of the basement are lowest in most surveying points north of F1 fault, implying the existence of the relationship with the geothermal water in the strata. According to the distribution of geoelectrical anomalies in the survey area, the authors locate the relatively enriched area of geothermal water in the basement of this area, thus providing an important basis for further geothermal exploration.