Abstract: The reasons for the failure of the impeller base material 2205 duplex stainless steel were studied, and the wear-resistant coating was prepared by laser cladding and laser remelting for protection and strengthening. The orthogonal experiments were used on 2205 duplex stainless steel to study the effects of laser power, scanning speed and powder feeding speed on the forming effect of the cladding layer. The wear performance test of the steel was analyzed. According to the test, when the power is 1000 W, the scanning speed is 6 mm/s and the powder feeding speed is 1.5 r/min, the cladding layer has the best effect, without obvious defects such as cracks and pores, and the surface hardness of the cladding layer is 487.2 HV0.2. The laser remelting test was carried out under this parameter, and it is concluded that under the conditions of the laser power of 1000 W and the scanning speed of 12 mm/s, the surface of the remelted layer is smooth, and the surface hardness of the remelted layer is 658.5 HV0.2. The wear amount of the base material is 0.0751 g, the wear amount of the cladding layer is 0.0350 g, the wear amount after remelting is 0.0211 g, the wear amount of the cladding layer is 46.6% of the base material, and the wear amount of the remelted layer is 28.1% of the relative wear of the base material. Compared with the original substrate, the cladding layer enhances the wear resistance of the substrate surface. After laser remelting treatment, the wear resistance of the cladding surface is furtherly improved, which can provide important reference value for further repairing the impeller of the circulating pump.