The aerofoil-shaped fan blades of the cooling tower are made of aluminum alloy by hot extrusion, with a hollow wing-shaped cross-section, featuring light weight, high air volume, low noise, excellent balance, and long-lasting without corrosion or deformation. Compared to fans of the same model made from other materials, the fan has a 20% higher air volume at the same rotational speed. The aerofoil fan diameters range from 1200MM to 8000MM, with two blade widths available: 260mm and 350mm, and three blade quantities: 3, 4, and 6. The center hole diameter can be customized according to the motor or reducer. High-strength hollow aluminum wings are used, with the main shaft made of alloy material with a diameter of 36-50mm, hardness of 40Cr, and a total length of ≥1/2L, ensuring no cracking at high wind pressure and high speed. Multiple U-shaped clamps with a diameter of 14-16mm are used for fixation, allowing the blade angle and blade tightness to be adjusted flexibly according to the selected air volume. With a variety of options and flexible combinations, the air volume ranges from 20,000m³/h to 900,000m³/h, and the main shaft hole diameter ranges from 28mm to 80mm. Suitable for any type of cooling tower, it is widely used in square cross-flow cooling towers, square (circular) counter-current cooling towers, and evaporative condensers, etc.