<p>This study systematically investigates the laser cladding of CrMnFeCoNi high-entropy alloy (HEA) coatings on Q345 steel substrates, with a focus on understanding the effects of laser power (800-1200 W) and scanning speed (6-10&#xa0;mm/s) on microstructure evolution, mechanical properties, and corrosion/wear resistance. The results demonstrate that the specific energy input (<i>E</i> = <i>P</i>·<i>v</i>⁻¹) plays a critical role in coating formation, where moderate energy levels promote uniform powder melting, while excessive energy induces surface defects due to melt pool instability. Microstructural characterization reveals a gradient architecture comprising fine equiaxed grains at the top, mixed equiaxed/cellular/columnar grains in the middle, and coarse columnar grains near the substrate interface. All coatings maintain a single-phase FCC structure with strong (111) texture, indicating excellent phase stability. Mechanical evaluation shows non-monotonic hardness variations with parameter changes, while wear resistance consistently deteriorates with higher energy inputs. Tribological tests indicate that coatings prepared at lower scanning speeds exhibit superior wear performance, with the 1000 W-6&#xa0;mm/s combination showing optimal behavior (COF: 0.6046). The electrochemical measurements reveal maximum corrosion resistance at 1000 W, with scanning speed showing negligible effects. These findings establish comprehensive processing-structure-property relationships, providing valuable guidelines for fabricating HEA coatings with balanced performance for demanding industrial applications.</p>