Abstract: The coal plays a dominant role in the primary energy consumption in China, gas is the associated productin in the process of coal mining, which is one of the main disasters to threaten the safety of coal mining, the gas prevention difficulty increases constantly with the changes of the coal mining conditions and the coal mining process. This paper introduces the gas prevention technology in recent years from the aspects of the gas prediction technology, gas extraction and utilization technology, coal and gas outburst prevention technology, gas coal dust explosion prevention technology and gas warning and monitoring technology. The existing problems of the existing gas prevention technology are analyzed, and the development assumption of the future gas prevention technology is proposed.