The centralizer is the stabilizer, which is a tool for stabilizing downhole drilling tools and preventing deflection. A device connected to a section of drill pipe string close to the coarse-diameter drilling tool to stabilize the drilling direction is an important tool for preventing well deviation changes in oil, natural gas and geological exploration drilling projects. The centralizer is eroded and worn during use, which leads to premature failure. Laser cladding is used to repair the worn parts and restore the original size. The repair material is made of non-magnetic hard alloy material. The hardness and high wear resistance of HV900, Effectively resist wear and erosion, and greatly increase the life of the centralizer.