In recent years, the demand for carbon disulfide in the chemical industry is increasing, and carbon disulfide is flammable and explosive. In the production process, fire accidents of carbon disulfide are prone to occur, which are extremely harmful and easy to cause economic losses and casualties. In the study of fire accident hazard, the flame spectrum research is very necessary. Because the flame spectrum contains much information, including flame temperature, combustion components, thermal radiation intensity of each band, etc., it is necessary to conduct an in-depth study of its flame spectral radiation. In this paper, carbon disulfide as the research object, and the flame spectrum test platform was built based on infrared spectroscopy. The test platform was mainly composed of VSR infrared spectrometer, telescopic device and burner. The carbon disulfide, styrene, acetonitrile and ethyl acetate were tested at 5 cm combustion scale. The combustion flame spectrum of carbon disulfide, styrene, acetonitrile and ethyl acetate fuels in the infrared range of 1～14 μm was tested at 5 cm combustion scale, and the carbon disulfide was mixed with styrene, acetonitrile and ethyl acetate in 1∶1. Flame spectrum, the characteristic band of carbon disulfide flame spectrum was obtained, and the carbon dioxide flame spectrum characteristic database was constructed. In the study of fuel flame spectrum, the carbon dioxide flame is blue when it burns, and does not smoke, it is flame spectrum radiation mainly comes from three kinds of molecular radiations of SO2, CO2 and H2O at high temperature. The characteristic peak of SO2 is 4.05, 7.4 and 8.51 μm, CO2 characteristic peak is 2.7 and 4.3 μm, H2O characteristic peak is 2.5, 2.7 and 5.5～7 μm. The spectral characteristics of acetonitrile and ethyl acetate fuel combustion flames are basically similar. The flame spectrum radiation mainly comes from CO2 and H2O molecular radiation at high temperature. In addition to high-temperature gas radiation, styrene flame spectrum radiation has strong carbon black radiation, the carbon black has a center wavelength of 7 μm and a temperature of about 414 K. In addition, styrene fuel has a unique C—H* stretching peak at 3.6 μm compared to the other three chemicals. Compared with the flame spectrum characteristics of styrene, acetonitrile and ethyl acetate, the carbon disulfide flame spectrum has unique characteristic peaks at 4.05, 7.4 and 8.51 μm, which are generated by SO2 molecules. These characteristic peaks can be used as one of the fire bases for space exploration. In the study of fuel mixed combustion flame spectroscopy, when carbon disulfide is mixed with styrene, acetonitrile and ethyl acetate, the combustion flame spectrum characteristics are basically similar. The flame spectrum radiation mainly comes from CO2, H2O and SO2 molecular radiation at high temperature. The experimental results also show that in the mixed combustion, the flame spectral characteristic peak of carbon disulfide is not interfered by the components of other fuels, and the characteristic peak is still obvious. This result can lay a foundation for the research on detecting and identifying carbon disulfide fire using space remote sensing detection technology.