Aim\ To realize rapidly the design and manufacture of fan blade and its die according to the automobile cooling fan. Methods \ The non contact 3D laser measuring is used to obtain the point data of the object surface of blade. The principle of reverse engineering and the theory of 3D reconstruction and solid modelling are utilized. Results\ The CAD model of the blade and its die and NC code of the die are found. Conclusion\ It is proved that this method of reverse engineering is of high quality
precision and efficiency. And it can be generalized widely.