Abstract: The graphics file denoting format DXF is introduced in the paper.Using AUTO CAD software, the 3DS’ drawback can be made up. It is difficult to draw two or three dimensional complicated graphics with 3DS.By analyzing the file structure of Jinshan DOS Chinese text, a program is given, which can convert the ready made,plentiful Jinshan Chinese library to DXF file, thus solving the problem that 3DS cannot directly realize the Chinese text. With the above technology and methods, two computer animation products are designed: SANTANA auto brake pliers system and behind pump system.