该文以树的形式建立枪械图形库并给出了图形库的３种检索方法：枪名、部件、零件，图形库中的所有图形可以任意选择查看。为将零件图组装成装配图并实现自动消隐，文中探讨了图形元素的装配方法并利用三维实体功能实现二维图形的消隐。用该方法建立的枪械图形库已直接应用于步枪方案设计专家系统之中。 This paper builds the firearm graphics library in the form of tree and gives three kinds of retrieval methods of the graphics library: gun name, parts, parts, all graphics in the graphics library can be arbitrarily selected for viewing. In order to assemble the parts into an assembly drawing and achieve automatic blanking, this paper discusses the assembling method of the graphic elements and realizes the blanking of the two-dimensional graphics by using the three-dimensional solid functions. The firearm graphics library established by this method has been directly applied to the rifle program design expert system.