There are three main reasons for gas leakage: one is negligence during use; second, the gas equipment and appliances are aging and damaged; The third is intentional, that is, self-destructive behavior. Once a gas leak accident occurs, the safety of many people's lives and property will be threatened, especially in high-rise buildings, underground buildings and densely populated places, and large-scale and large-scale disasters will occur. Therefore, in addition to strengthening daily management and prevention of the use of urban gas, disaster disposal work should also be done in the event of a gas leak.