Taking the world’s highest 220 m domestic super large cooling tower under construction as the example, the flow field information and the three-dimensional aerodynamic forces during construction period are obtained based on large eddy simulation (LES). The average wind pressure distribution of the entire tower results are compared with the standard and the measured curves to verify the validity of the numerical simulation. On this basis, the average wind pressure and pulsating wind load variance distribution characteristics of the whole construction process of tower drum are contrasted and analyzed. Then the ritual law carrier frequency domain features of the whole construction process are systematically contrasted and studied, which include wind pressure power spectrum features of typical measurement points, the power spectrum of lift and resistance coefficient, ring to the coherence of typical measurement points, and the vertical coherence of lift and resistance coefficient. Finally, the calculation formula of the power spectrum with height for typical measurement points is fitted based on least square method. Studies show that the pulsating wind load energy of the tower under construction and the whole tower are both concentrated in the low frequency area, and the pulsating wind load at the central tower drum is weaker than that in other positions. With the increase of construction height, the power spectrum density function of pulsating wind load and layer resistance shows a trend of decreasing first and then increasing, the power spectrum value of lift coefficient is bigger in the lower part of tower and smaller in the upper part, and the ring to the coherence of typical measurement points and the vertical coherence of lift and resistance coefficient are gradually weakening. Main conclusions can provide a reference for the value designing of the wind load for this kind of large cooling tower during construction.