Abstract： The wind pressure distribution, wind-load shape coefficients and equivalent static wind loads of a complex longspan dome-grid structure under undulating terrains were numerically simulated using FLUENT. The results show that the distribution of wind load shape coefficients are quite different with the change of the wind direction. The time-history series of wind velocity was simulated based on the harmonic superposition method and then turned into the timehistory series of wind pressure. The FEM model of the structural system was constituted by using ANSYS and the structural wind-induced responses and wind load shape coefficients were obtained based on the timehistory series of wind-pressure. The wind-induced dynamic amplification factor was defined, so the structural resonant responses could be considered. Then, the wind-induced dynamic amplification factor was combined with the distribution of instantaneous wind pressure at the given time and the equivalent static wind loads of the structural system were established. The numerical analysis reveals the distribution of  equivalent static wind loads based on the minimum vertical reaction forces of structural system.