The CO₂ concentration measurement technique based on near-infrared dual-comb spectroscopy is investigated. The experiment utilized two femtosecond frequency combs with a central wavelength of 1550nm, constructing a dual-comb spectroscopy system through precise locking technology, and selected the CO₂ absorption spectral line at 1572nm for measurement. The results show a measurement error of 4.27% for CO₂ concentration, with a spectral resolution of 113MHz. The study confirms the feasibility of the dual-comb system in near-infrared CO₂ measurement and discusses methods to enhance measurement accuracy, providing significant reference value for the development of ultrafast laser spectroscopy technology.