Abstract This paper used common experimental instruments such as flask with three necks, igniter device for lighting a gas flame, constant pressure funnel to design experiment device, in which the combustion of sulfur in the air, the preparation of oxygen, the combustion of sulfur in oxygen, and the absorption of sulfur dioxide were completed. And the shortcomings of the experiment in the textbook were solved. The experimental improvement could cultivate students' creative ability and environmental awareness, and then improve teaching effect.