Abstract：The magnetotelluric sounding data in mountainous district are mainly influenced by landform and shallow inhomogeneous body. These influences can hardly be separated out respectively. Authors give TE and TM joint 2-D inversion method，namely an inversion method for simultaneously removing all influences resuiting from landform and shallow inhomogeneous body. This method consists of three steps:recognition of TE and TM polarization curves，model construction and inversion. Theoretical and real data results show that this method is very effectiveb on the processing of magnetotelluric data in mountainous district.
