托里拆利实验是初中物理教学中必做的演示实验 ,做好该实验要有较高的实验技能 .原实验滴加水银时不容易挤走细玻璃管中的气泡 ,倒置时手要接触有毒物质 ,一不小心水银还会四处溅溢 ,既污染环境又会混入气泡 ,且实验误差较大 ,因此有些教师干脆不做这个实验 ,教学效果大打折扣 Torricelli experiment is a must-do demonstration experiment in junior middle school physics teaching. To do this experiment requires higher experimental skills. The original experiment is not easy to squeeze the bubbles in the thin glass tube when adding mercury, and the hand must be touched when inverting. Toxic substances, accidentally mercury will splash everywhere, pollute the environment and mix bubbles, and the experimental error is large, so some teachers simply do not do this experiment, the teaching effect is greatly reduced