Abstract: CO₂ concentration in industrial flue gas is low and contains different pollutants, so it is uncertain whether it can be directly used as gas fertilizer．In order to study feasibility of directly using CO₂ form industrial flue gas for gas fertilizer agriculture, flue gas characteristics, CO₂ composition and its pollutants on agricultural production were analyzed．Based on CFD numerical simulation technology, diffusion and distribution characteristics of CO₂ were simulated and analyzed．Results showed that high concentration of CO₂ from power, steel, cement or other industrial flue gases could be used for promoting plant growth．Different pollutant components in industrial flue gas may affect ambient air quality in greenhouses, so it only can be used for carbon-rich agriculture after reasonable evaluation or suitable measures were taken．Based on characteristics of flue gas emitted from coal-fired power plants, when CO₂ absorption rate was 5×10⁻⁸ m³/s and flue gas was diluted by 100 times, moreover, control inlet concentration of SO₂, NO₂, Hg, HF, PM to 15 mg/m³, 8 mg/m³, 5 μg /m³, 0.2 mg/m³ and 7.5 mg/m³, environmental air quality could be controlled to meet A-level standard of GB 3095—2012．At this point, concentration of CO₂ also met concentration requirements of plant growth．Different CO₂ inlet has a great influence on CO₂ concentration in greenhouse, and scheme of placing points on both sides and in the middle at the same time could get a uniformity requirement of CO₂ concentration in greenhouse．Results also showed that directly using from industrial flue gas to carbon-rich agriculture was feasible, but in practical application process, CO₂ concentration in flue gas, absorption rate, CO₂ injection location, dilution ratio and pollutant concentration must be comprehensively evaluated before applied to agricultural production．