Based on the CIMISS, under the MUSIC specification, using C# language, combined with the Surfer plugin, a visual interface of contour color map is developed, which can greatly improve the efficiency of scientific research and work, and effectively complement the visual function of MUSIC. This paper also describes the improvement of the mechanism for applying shade guide files to graphics as drawing contour maps, to allow the program to directly load the shade guide files built beforehand when contour lines are filled with colors without generating .lvl shade guide file in real time each time, which can greatly improve drawing speed. The method of determining the map size with the width and height proportional coefficient in gridding process can not only make the image generated harmonious proportion, but also perfectly solve the problem of saw teeth at the edges of the image generated.