在立体几何教学中培养学生的空间想象能力是个老、大、难问题,学生一遇上题目,图就画不出来,即使有了图,也看不懂。这是因为几何体的直观图形无法反咉空间几何体的真实形状、相关位置和数量关系,给解题带来了很大的困难.许多学生感到立体几何太难学,入不了门。为了解决这个问题,在教学中可采用模型教具,但是目前各学校采用的教具大多是铁丝焊接或者木板胶合而成的.不能作到每个学生人手一个,于是 Training students’ spatial imagination ability in the teaching of solid geometry is an old, big and difficult problem. When a student encounters a topic, the drawing cannot be drawn. Even if there is a figure, it cannot be understood. This is because the intuitive geometry of the geometry cannot reflect the true shape, position, and quantity relationship of the spatial geometry, and brings a lot of difficulties to solving the problem. Many students feel that the three-dimensional geometry is too difficult to learn and cannot enter the door. In order to solve this problem, model teaching aids can be used in teaching, but at present the teaching aids used in schools are mostly made of wire welding or wood glue. It cannot be done by every student. Therefore,