Abstract: Surfacing welding was used to improve the lifetime of the module in the slab sizing press.The mechanical properties,high temperature hardness,anti-oxidation performance and microstructure of the surfacing welding layer were investigated.The results show that the mechanical properties,high temperature hardness and anti-oxidation performance at high temperature of the module were improved by surfacing welding.In the surfacing welding layer,tempered sorbite and ferrites had been observed.The application results illuminated that using surfacing welding,the lifetime of the experimental module was superior to that of the domestic module without surfacing welding,and it could replace the imported one with lower cost.