在化学教学中，演示物质之间的反应大多在试管中进行。为了使学生能清楚地对比试管中发生的现象，教师常将几支试管并排握在手里。为了使试管中发生的现象更加鲜明，经常用白纸或黑纸做底衬，操作起来比较麻烦。因此，笔者设计制作了一种小巧的演示用试管架，可以克服上述不便 In chemistry teaching, the reactions between the demonstration substances are mostly carried out in test tubes. In order to enable students to clearly compare the phenomenon in the test tube, teachers often hold several test tubes side by side in their hands. In order to make the phenomenon in the test tube more vivid, often use white paper or black paper as the bottom liner, the operation is more troublesome. Therefore, the author designed a compact test tube rack to overcome the above inconveniences.