Abstract: Al_0.2Cr NbTiV refractory high entropy alloy coatings were deposited by high-speed laser cladding technology on the surface of titanium alloy, and the effects of the heat treatment temperature on the microstructure, hardness, and wear-resistant properties of the coating were analyzed. The results show that the coatings are prepared with different process parameters maintain single BCC solid solution structure, with a thickness of 250 μm and good quality. After heat treatment at 650 ℃, the phase structure of the coatings keep unchanged, means that the Al_0.2Cr NbTiV alloy has a good structural stability until 650 ℃. The microhardness and wear resistance of the coatings are both enhanced by the elimination of lattice defects and the solid solution strengthening effect, and the low heat input coating has the best wear resistance. After heat treatment at 850℃, C14 Laves phase is precipitated. Due to the uniform and fine precipitated Laves phase, the hardness of the coating with low heat input increases significantly, with an average microhardness of 633.2 HV0.2, while the Laves phase of the coating with high heat input is coarse and unevenly distributed due to the uneven coating elements and high Ti content.However, the precipitation of Laves phase leads to the exfoliation of hard phase debris in the friction process,which intensifies the wear and increases the wear volume.