Abstract: The multi-parameter disaster gas analysis and detection device of mine-used laser spectrum, has the characteristics including high accuracy, high sensitivity, wide range, low error, it is designed based on the spectrum absorption detection technology of tunable diode laser. This device can overcome the interference of water vapor, dust, background gas and other factors, and the large scale extension is achieved in the field of coal mine safety. It can not only improve the coal mine safety management level, but also provide a powerful guarantee for high production and high efficiency in coal mines.