1． Institute of Tectonics and Geophysics，Far Eastern Branch，Ｒussian Academy of Sciences，Khabarovsk 680000，Ｒussia; 2． College of Geo-Exploration Science and Technology，Jilin University，Changchun 130026，China

From China to Ｒussia，Tan-Lu fault system stretches for thousands of kilometers，towards NE 30°． The authors have collected more than ten magnetotelluric profile that China and Ｒussia have carried out，in the studied area of the Tan-Lu fault's northern section，and have analyzed electrical characteristics of the relevant profiles． Deriving the following conclusions: ( 1) Jiamusi-Bureya plots，etc．，demonstrate the high resistance of Kernel; ( 2) Fold belt attributed to the land showed high and low resistance stitching，associated with not only terrane accretion，but also upper mantle upwelling; below the sedimentary basin，the resistivity of the upper mantle is lower and closer to the surface comparing with the adjacent area( 100-150) ; ( 3) In the system of Tan-Lu fracture，Yishu and Dunmi fracture，etc． are expressed as vertical low-resistivity zone; ( 4) There may exist subducted old-fashioned piece under Jiamusi and Bureya plots．