Abstract: In order to enhance the auxiliary function of experimental teaching for the professional basic courses and making students deeply understanding the complex issues of gas explosion flame propagation mechanism in the "Combustion Science" course, School of Safety Engineering Experimental Center has developed a visualization experimental teaching platform for gas explosion flame measurements. Based on this platform, experimental teaching research about gas explosions was carried out for guiding students to test and analyze the propagation process of gas explosion flames and the dynamic evolution rules of explosion pressure. It was found that in the developed cylindrical constant volume explosion device, when the central ignition electrode was used for ignition, the gas explosion flames under all equivalent ratio ϕ conditions presented a spherical flame structure. Under the conditions of extremely poor combustion and extremely high combustion, buoyancy type flames would be produced due to the buoyancy effect. Under lean combustion conditions, the flame of a gas explosion is more likely to be affected by flame instability and transform into turbulent combustion. Affected by the wall effect, gas has the strongest explosion pressure ( p_\max ) under the condition of equivalent ratio ϕ=1.1, while it has the largest explosion pressure increase rate ( (dp/dt)_\max ) when the equivalent ratio ϕ=1.0. And both p_\max and (dp/dt)_\max have a linear relationship of positive correlation with the product ( E\cdot S_\mathrml ) of the thermal expansion ratio E and the laminar flow combustion velocity S_\mathrml . Through the construction of a visual experimental platform and experimental teaching practice, students’ intuitive understanding of the flame propagation characteristics of gas explosions has been enhanced, their comprehension of the flame propagation mechanism of gas explosions has been deepened, and it has played a good auxiliary role in the classroom teaching of the professional basic course “Combustion Science”, cultivating students’ experimental operation ability and interest in scientific exploration.