Abstract: To solve the problem of low Cr reduction efficiency on the journal surface of a 9%Cr steel rotor caused by high dilution rate and high heat input when surfacing 1CrMo alloy on the rotor journal, where local repair is not available after wear damage, a deposit welding test was carried out with 1CrMo alloy on the surface of 9%Cr steel by laser cladding instead of surfacing, following which, the microstructure and properties of the 1CrMo cladding layer were tested and analyzed. Results show that the laser cladding technology helps to form good cladding of 1CrMo alloy on the surface of 9%Cr steel, with high mechanical properties of the cladding layer. Compared with surfacing technology, the laser cladding can effectively reduce the dilution of substrate to the cladding layer, thus improving the Cr reduction efficiency of the surface. Compared with the base metal, the tensile strength of 1CrMo cladding is slightly lower, but its ductility and toughness are better, proving the mechanical properties of 1CrMo cladding to meet the design requirements of 9%Cr rotor journal in steam turbines.