Customization and Exploitation of Shape and Line Type in AutoCAD

The customization and development of shape and line type is very important during the using of AutoCAD, and it is the base for the continue development on the platform named CAD. It is also necessary for technology engineers to grasp it. The paper discusses the development of the line type based on the line development of AutoCAD. Because of the use of shape during the development of the line type and its special use in the practice,also discuss the customization of the shape. At last use shape to express the weathering degree of rocks in the engineering geology and make it into the line as the weathering boundaries of the rocks when do the practical work.