Abstract: In view of problems of complex drawing, abstraction and easy to make mistake existed in traditional 2D design of coal bunker, the paper proposed a scheme of 3D CAD of coal bunker. Taking -600 coal bunker and surge bunker of main shaft of Hengyuan Coal Mine as example, it introduced implementation of 3D CAD and animation demonstration of the coal bunkers in details. The scheme solves communication problem between designer and builder in construction of complex project and provides basic guarantee for high quality and fast construction.