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To understand the characteristics of the deep structure about the western side of the Xuefeng mountain and to promote the selection of petroleum exploration strategic areas, the authors through summarizing the forward modeling char- acteristics of megnetotelluric(MT) sounding technology and combined with the geological characteristics and physical proper- ties of the area to analysis the magnetotelluric(MT) sounding data, the faults, folds and subsurface stratigraphic distribu- tion. Based on the above analysis, forecasted the favorable area for petroleum exploration, and the prediction is almost the same with the geological information, so it provides basic data for further exploration in the area.