In order to improve the wear resistance of 34CrNiMo6 steel used for cutting tools, the WC/Ti-Al coating was prepared on the surface of 34CrNiMo6 steel by laser cladding. The effects of Al content on its microstructure and tribological properties were analyzed by experimental testing methods. Results show that the cladding layer with better structure is obtained by gradually increasing Al content, while the surface quality of cladding layer decreases when Al content is too high. The bonding phase composed of Al phase and Ti-Al phase is formed by adding Al cladding layer, and the composite cladding layer composed of WC, TiC and Al2O3 is obtained by in-situ growth. After adding 20%Al, the cladding layer with dense structure is prepared, and the uniform grain size is obtained, which formed a good metallurgical bonding with the matrix. The hardness of Al-free cladding layer is lower than that of HSS substrate. When the Al content reaches 20%, the hardness of cladding layer is the maximum, and the hardness of each position is similar. Lower friction coefficient is obtained by adding Al into the cladding layer. With the increasing of Al content, the wear of the cladding layer decreases and then increases, and the microstructure of the cladding layer becomes denser, and a certain degree of plastic flow occurs and chip chips are generated.