ENVI and MapGIS software are used in linear structure density diagram and linear structure strike-density rose diagram with ETM+ imagery in Guposhan area, Guangxi. The results show that in the NE and NW direction there are advantage direction linear structures.The linear structure density in Guposhan shows double-ring shape with Lisong unit as low value zone increasing outward and Xinlu unit as high value center decreasing outward. So there is corresponding relation between different density area and granite rock unit division in Guposhan area.