Abstract: To obtain high performance coating materials, the HEAs MoFeCrTiWAlxSiy coating was prepared on 45# steel by laser cladding. By means of OM, XRD and micro-hardness tester, the microstructure and properties of the high-entropy alloy layer with adding Al and Si element were investigated. The experimental results indicate that the addition of Si element will promote the formation of intermetallic compound, and Al in the coating exhibits obvious the grain refining. In addition, the hardness of the coating is significantly increased, and reaches a maximum (839.3 HV). Adding Al can inhibit the formation of intermetallic compound and induces the simple BCC phase structure of the coating, but the hardness of the coating decrease. Simultaneous addition of Si and Al, the excellent quality coating with detailed microstructure and relatively high hardness can be obtained.