实验室常用水银柱和水柱测量大气压强.然而水银由于有毒是教室里禁用的物品,利用托里拆利方法需保证水银的密封性;利用水柱测大气压,由于水中溶解有空气,水的饱和蒸汽压较大,实验虽然壮观,但实验难度较大.本文介绍一种利用气体性质测量大气压强的方法,这一实验不仅实验装置简单,而且误差较小. Laboratory commonly used mercury and water column to measure atmospheric pressure.However, mercury is toxic because the classroom is prohibited items, the use of Torrodishery method to ensure the mercury seal; using atmospheric pressure measurement of water, due to water dissolved in air, water, saturated steam Although the experiment is spectacular, it is more difficult to experiment.This paper introduces a method to measure the atmospheric pressure by using the gas properties, which is not only simple in experimental setup, but also less in error.