Abstract: CO emission from iron and steel sintering flue gas has been paid more and more attention. However, there is a lack of efficient and practical CO removal technology for large flow flue gas. A series of coated catalysts were prepared by coating powder catalyst on cordierite honeycomb ceramic supports. The physicochemical properties of the coated catalysts were analyzed based on a series of characterization techniques, and the catalytic performance of CO was evaluated under actual sintering flue gas conditions. The results show that 1wt‰ polyvinyl alcohol content of slurry and 300℃ calcination could promote the uniformity of powder catalyst distribution on the surface of the support, and improve the ratio of Mn⁴⁺/Mn³⁺and O_ads/O_latt. The coating shedding rate of the optimized coated catalyst is 1.25% after 60 min ultrasonic vibration. The catalytic efficiency of 99%CO can be achieved at 7500 h⁻¹ space speed, 1%CO, 8% water vapour content and 110℃, and remains stable within 72 h. Based on the actual desulfurization of sintering flue gas in a steel plant, the efficiency can be stable above 82% after 720 h. The study can provide reference for the application of CO removal technology for industrial flue gas.