Abstract: In this article, we propose a so-called crack- concentrated volume model and work out the representation of the electrical conductivity vector for crack-complex medium as well as that for EDA-medium, a specific instance of the former. And, from the point view of MT methods, given is the formulas for forward problem to EDA-included two strata structure. Finally, the authors show the MT image based on the derived results. This study aims to pave a foundation for further study on the electrical anisotropy and the related combinatorial explanation.