Abstract: Gas control is the most important work in the process of coal mining. Gas control should not only be timely and rapid, but also have a sense of advance. This paper proposes a new early warning technology by studying the calculation model of the relative gas emission of the coal mining face. Through the trend change of the relative gas emission, combined with the amount of gas extraction and the amount of gas discharged by air, it can predict the gas control situation of the coal mining face in advance. At the same time, using the concept of Big data and the most appropriate programming language, the gas calculation model that has passed the actual verification is solidified into a related system, This provides a new comprehensive gas management platform for coal mine managers and technicians.