Abstract: In order to research the effect of substrate on microstructure and properties of laser cladding self-lubricating coating, laser cladding was carried out on the surface of Ti811 alloy and TC4 alloy by coaxial powder-feeding laser cladding technology using TC4, Ni45, Al₂O₃, MoS₂ and rare earth oxide Y₂O₃ powder mixture as cladding material. The surface crack distribution of cladding layer was observed by penetration test. The elemental distribution and microstructure of coatings were analyzed by SEM, EDS and XRD. Microhardness and tribological properties of the coatings were examined. The results show that the element composition on the substrate can cause the difference of cladding layer phases. Because of the high content of element V, the precipitation of α-Ti on TC4 alloy is less than that of the laser cladding layer on Ti811 alloy. The thermal conductivity of substrates has a significantly impact on the microstructure and performance of the coatings. Because of low thermal conductivity and high density, TC4 alloy has low temperature gradient during laser cladding. As a result, the coating on TC4 alloy has less cracks, higher dilution rate, and coarser microstructure. The average hardness of coating on Ti811 substrate reaches up to 1303.5 HV_0.5 attributes to its good conductivity and high cooling rate. The wear mass losing of the cladding coatings on two alloys is significantly reduced, and the average friction coefficient drops to below 0.3. Due to the reinforcement of hard phase and anti-fiction of soft phase, laser cladding coatings on different substrates both have excellent wear resistance property.