The work aims to realize the superhydrophobic surface of mesh materials by adjusting the wettability, so as to enhance the loading capacity of mesh material on different liquid medium surfaces. The superhydrophobic copper mesh was obtained by electroless plating and chemical modification with n-octadecyl mercaptan. The loading capacity of copper mesh in solution (pH=1~13) and sodium chloride solution (concentration of 5%~30%) was studied. Through calculation, it was verified that the additional buoyancy generated by hydrophobic effect was the cause to improve the loading capacity. When the pH=7, the maximum loading capacity of copper mesh was 12.97 g, 8 times bigger than the dead weight of copper mesh. As the alkalinity or acidity of liquid medium increased, the desorption of n-octadecyl mercaptan coated on the surface of copper mesh caused the loading capacity of copper mesh to decline, but the loading capacity was still 5 times larger than that of the original copper mesh. In different concentrations of brine, the loading capacity of superhydrophobic copper mesh was basically consistent with that in pure water, which was the result of the combination of liquid density change and superhydrophobicity. Through surface superhydrophobic treatment, the loading capacity of copper mesh on different liquid medium has been improved and the research results have a certain application prospect in increasing load and reducing weight of sailing ships and surface vehicles, and provide a feasible idea.