Aiming at the low oxygen volume fraction in hot air sintering process, resulting in low utilization coefficient of sintering production, poor quality index and increased solid fuel cost, etc., the hot gas oxygen volume fraction, oxygen-rich time, fuel ratio and flue gas oxygen volume fraction under the production conditions of hot air sintering and oxygen-rich matching production are optimized by a sintering cup test method, the influence of oxygen-rich hot air sintering on the sintering process is systematically analyzed, and the test effect before and after parameter optimization is tested. On the basis of the test conclusion, the industrial practice of oxygen-rich hot air sintering of TISCO 450 m² sintering machine is carried out. The results show that oxygen-rich hot air sintering improves such physical and chemical indexes as sinter tumbler strength and FeO mass fraction, reduces the sinter return ratio, and increases the utilization coefficient, followed by a downward trend in solid fuel consumption and electricity consumption, achieving the goals of high quality, high yield and low consumption.