Method and device for acquiring electric anisotropy of underground media based on direct current method

The invention relates to a method and device for acquiring electrical anisotropy of underground media based on a direct current method. The method comprises the following steps: after arranging an emission field source at any position of a measurement area, carrying out whole-area observation in the measurement area by adopting mutually orthogonal electrodes to obtain mutually orthogonal potential differences in two directions between different measurement points, calculating apparent resistivity according to the potential differences, calculating normalized apparent resistivity, calculating background apparent resistivity according to a selected background resistivity model, calculating normalized background apparent resistivity, and calculating the resistivity anisotropy coefficient according to actual normalized resistivity and the normalized background apparent resistivity. According to the invention, field source arrangement is flexible and simple; by adopting the resistivity anisotropy coefficient, the