Abstract: Surface on H13 hot die steel was cladded with Stellite X-40 Co-based alloy using a high power carbon dioxide laser.The micro-structure,phase identification,composition distributing and performances of the cladded layer were examined using optical microscopy,scanning e-lectmn microscopy,X-ray diffraetometry,abrasion machine and poten-tiodynamic polarisation technique,respectively.The resuhs indicated that the dendrite structure was fine and homogeneity for optimum interaction time.Laser claddings Miency improved the wear and corrosion resistance of H13 hot die steel.It had been tested in practice that the properties of hot die with laser clad were remarkably better than those of hot die of the steel H13.