With the continuous increase in mining depth and scale, the energy-efficient operation of mining counter-rotating fans has become increasingly critical. While adjustable-blade counter-rotating fans can adequately meet the varying demands for air volume and pressure in fully mechanized mining faces, they face challenges such as limited underground transportation space, difficulties in installation and maintenance, and high energy consumption. To address the lightweight design requirements of mining counter-rotating fans, a three-dimensional solid model of the fan was established, and finite element analysis was performed on its key component—the hub—using Ansys Workbench. Based on the simulation results, an orthogonal experimental design was employed, selecting four parameters—hub width, hub plate thickness, concavity depth on both sides of the hub, and side plate thickness—as experimental factors. Range analysis was used to investigate the influence of these factors on the hub mass. Finally, structural optimization of the hub was carried out. The results indicate that side plate thickness and hub plate thickness have a significant impact on the overall hub mass. After optimization, the hub mass was reduced by 3.90 %, and the maximum equivalent stress decreased by 4.27 %. The optimized hub meets strength requirements while achieving lightweight objectives.