A magnetotelluric sounding was carried out in the eastern edge of Tibetan plateau along Mianning-Yibin that starts from Kangdian Geo-axis (KDG) eastward crossing the Daliangshan block (DLSb) and ends in Sichuan basin block (SCb). A 2-D modeling with consideration of topography is used with the NLCG(Nonlinear conjugate gradient method) inversion. 2-D electrical structure model of crust and upper mantle was constructed. The upward arched high conductive layer (HCL) exists in the crust of both KDG and DLSb, but not in SCb. The HCL has a low resistivity of 3~10 Ωm and its top is about 10~berType="1" TCSC="0">15 km deep (the shallowest less than berType="1" TCSC="0">10km) with a thickness about 15~berType="1" TCSC="0">25 km. The crustal electrical structure combined with that of Shimian-Leshan profile indicates that the HCL is continuous and extends for more than berType="1" TCSC="0">100 km in south-north direction. The high conductivity of HCL may be related to partial melt of rocks and some quantity of salt fluid prone to deformation and flow. The flow of HCL under the pushing force from Tibetan plateau is directed to E and/or SE in eastern Tibet plateau, and then turns to S or SSE in DLSb due to the obstruction of Sichuan basin. In EW direction it crosses the west boundary of DLSb, Anninghe fault (ANHf) and Zemuhe fault (ZMHf). The crust flow layer in the eastern DLSb underthrusts eastward beneath SCb. The relationship between the flow of HCL and the tectonic deformation of the crust and the seismicity is analysed in the article.
