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Magnetotelluric sounding method is to use the earth’s natural electromagnetic fields to carry out exploration. It is natural electromagnetic field source, through the surface observation of electromagnetic field components orthogonal to get the underground earth structure information. As the natural field contains the rich frequency from the high to low, according to the electromagnetic wave propagation and absorption of the medium, different frequency components of electromagnetic waves with different penetration (skin) depth, so we could be achieved by measuring deepth.This paper, "The Development of MT 2D Forward Software System", is based on Visual C + + as a development platform, by means of MFC Microsoft Foundation Class Library, design software interface and internal processing procedures. To achieve the 2D forward model, visual editing, display and calls algorithms to computing 2D forward model, then read operation results and show cross section map and save the map, improve and perfect its function, it is beneficial for user operation and use, it is also improve the efficiency of develop the model.The following work has been finished in thesis:1, Research the development of electrical hardware and software in domestic and international, understanding the MT and 2D forward modeling;2, In-depth study of software development and design platforms and development languages;3, According to the software functional requirements, develop a reasonable system framework map; Graphic region and coordinates the establishment, scale values, graphics, titles, color bars and resistivity values of the corresponding relationship;4, Complete forward modeling. Initialization grid and background resistivity. Through the Drawing toolbar and mouse event customization forward model, and modify the apparent resistivity to achieve a visual modeling of requirements;5, Complete the boundary expansion and display of a 2D forward model, and can range set with the graphic display shows changes in different regions;6, Save the relevant data for forward model, data format consistent with the interface requirements are algorithms;7, Successfully read the forward operation results and display the apparent resistivity and impedance phase transect, through the interpolation algorithm to improve the display and so on.
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