Mutual aerodynamic interference effects of stadiums have been a major problem in engineering design. Based on the pressure data acquired from the wind tunnel test of a rigid model of Zhangjiajie Stadium, the wind loads of the roof and the curtain walls of the stadium were discussed in order to study the interference effect of surrounding buildings. The interference factor method and multi-level modal force method were applied to calculate the Stadium roof's equivalent wind loads. Several conclusions were drawn. Because of interference effect, the wind loads of the roof of the stadium were much larger than those of the non-interfered parts. The interference factor of peaking negative pressures reached 1.5 and the interference factor of peaking positive pressures reached 5. Unfavorable wind pressure of curtain walls of the stadium appeared at the sag position and the corner position of curtain walls.