Abstract: H13 steel was successfully prepared by laser cladding deposition (LCD) additive manufacturing technology, and its phase and microstructure were characterized.At the same time, the hardness, wear resistance, tensile properties and fracture morphology of LCD-processed H13 steel and cast H13 steel were compared and analyzed.The results show that the longitudinal-section structure of the LCD-processed H13 steel at low magnification presents fish-scale distribution, and the lap interface of the melt channel is relatively coarse columnar crystal structure, and the middle structure of the melt channel grows in the reverse direction of the heat source and is fine dendrites.The main structure of LCD-processed H13 steel is acicular martensite, retained austenite and a small amount of carbides; the average microhardness of LCD-processed H13 steel is 652.5 HV0.2, which is 2.76 times of that of cast H13 steel; and the wear resistance of LCD-processed H13 steel is 1.5 times of that of cast H13 steel.The tensile strength of LCD-processed H13 steel reaches 1670.7MPa, which is significantly higher than that of cast H13 steel, but the elongation is significantly reduced, and there are obvious brittle fracture characteristics at the tensile fracture.