The wind velocity sensor is a sensor that can continuously measure wind speed and air volume. Using the traditional three wind cup structure, it is composed of three carbon fiber wind cups and a cup holder. The wind cup is made of ABS carbon fiber composite material, which has high strength and strong wind resistance. The hollow cup shell is fixed on the three-pointed star brackets at 120° or the cross-shaped brackets at 90°. The concave surfaces of the cups are arranged in one direction, and the entire cross-arm frame is fixed on a vertical rotating shaft. It has the advantages of large range, good linearity, strong resistance to lightning strikes, stable and reliable, and convenient observation.