Magnetotelluric (MT) survey is carried out in the earthquake area to obtain the MT array or profile data covered the epicenter. 2D and 3D MT imaging techniques can be used to obtain deep electrical resistivity structure. The seismogenic environment and the variation of resistivity along faults at the deep depth will be revealed. The electrical resistivity structure provides deep evidence for the determination of seismogenic structure. Based on MT imaging result and the relocated seismicity, the resistivity characteristics of the earthquake focal area are revealed, and the controlling of the subsurface electrical resistivity structure combination to the main shock and the distribution of aftershock will be discussed. These works will provide a basis for discriminating the characteristics of electrical resistivity structure in seismogenic structural areas.