Abstract: Fourier transform infrared spectroscopy（ＦＴＩＲ） detection technology has the characteristics of high detection accuracy, fast scanning speed and wide spectral range, which can realize qualitative and quantitative analysis of gas, liquid or solid samples, and has been widely used in petrochemical, environmental gas testing and many other industries. The paper analyzes the research progress and limitations of FTIR quantitative analysis algorithms at this stage. Taking the industry as an example, the application effect of FTIR technology in the study of coal chemical structure, coal functional groups and gas detection is discussed. Finally, it points out the main problems that restrict the application of FTIR technology in the field of coal mine gas detection.