Based on the tunable diode laser absorption spectroscopy technology, the absorbance of common hydrocarbon fuels and combustion products in the 3 632~3 650 cm^-1 band were simulated, and two pairs of CO₂ high-temperature spectral lines with center frequencies at 3 633.08 cm^-1 and 3 645.20 cm^-1 were selected. A high temperature spectral parameter measurement system was set up by using a three-stage high temperature tube furnace composed of three relatively independent temperature control zones. A stable and closed flow field environment was constructed. The spectral line intensity, self-broadening coefficient and their temperature index, air-broadening coefficient and its temperature index of two spectral lines were measured. The measurement results were compared with the CDSD-HITEMP spectral database. The relative deviation of the air-broadening coefficient of two spectral lines was significantly greater than other parameters, The maximum is 16.32%, and the relative deviation of other spectral parameters is within 13%.