<p>In order to obtain a high-entropy alloy (HEA) composite coating with high performance and reveal the influence of surface free energy on tribological properties, an AlCoCrFeNi-NiCrBSi HEA composite coating was prepared by plasma spraying and then subjected to induction remelting treatment. The microstructure, mechanical properties, surface free energy, and tribological properties of the coatings before and after remelting were comparatively studied. The results showed that the main phases in both coatings were (BCC + FCC) phase, but more hard phases were in-situ generated in the remelted coating, including CrB, Cr₇C₃, Fe₂B, Cr₂₃C₆, and (Fe,Cr)₇C₃. Compared with the as-sprayed coating, the mechanical properties of the remelted coating were significantly enhanced: The hardness and elastic modulus increased by 26.2% and 28.9%, respectively, and the fracture toughness increased by nearly 2.1 times. The surface free energy of the as-sprayed coating was 29.93&#xa0;mJ·m^-2, while that of the remelted coating was 20.68&#xa0;mJ·m^-2. Under dry friction conditions, the friction coefficient of the as-sprayed coating fluctuated greatly, with a stable friction coefficient of 0.51, while that of the remelted coating fluctuated less, with a stable friction coefficient of 0.41. Compared with the as-sprayed coating, the wear volume of the remelted coating decreased by 49.5%. Therefore, the remelted coating had superior wear resistance. The hardness and surface free energy affected the adhesion behavior of the coatings during the wear process. Due to its higher hardness and lower surface free energy, the remelted coating exhibited a lower and less fluctuating friction coefficient, with almost no adhesive wear occurring.</p>