Abstract: Objective The aim is to develop a high-wear-resistant, high chromium cast iron flux-cored wire for sintering machine grate plate body. Methods The process performance under varying deposition currents, voltages, and speeds was investigated. Results The developed wire under different welding parameters, spatter rate is less than 2.5%, spatter is less and stability is good. Single-track deposited metal has a flatness of over 80%, has no defects such as pores, and has good forming performance. Microstructure of the deposited metal is carbides, residual austenite and martensite, in which carbide content is higher than 50%. Hardness of the deposited metal reaches 62.1 HRC. At 750 ℃, wear rate of the deposited metal is 0.121%, and high temperature wear resistance is good. High temperature wear resistance of grate plate body is improved by grid and prefabricated cemented carbide process. The grid frame is used to prevent crack penetration and spalling of high chromium cast iron deposited metal. Wear resistance of grate plate body is further enhanced by pre-set hard alloy. Conclusion Service life of grate plate body of sintering machine prepared by the developed flux-cored wire and process technology is increased by 2.5 times.