The span of vault of large-scale storehouse is long and its topography is exceptional.The shape coefficient for the storehouse must be gained by the wind tunnel test.In this paper,a large-scale storehouse,which span is 2x100 m,is taken as case studied.The wind tunnel test for its model is done in the turbulent boundary layer,which simulated the natural wind over typical open-country.The distribution of wind pressures on the storehouse is measured by the model.The effects on the wind load by the internal stuff and end anti-wind net is investigated.Basing on the analysis for the results from wind tunnel test and referring the national standards of several country,the dynamic wind loads is get and the gust loading factor is calculated.It is shown,the distribution of wind pressures and the shape coefficient from wind tunnel test is affect by wind direction and the anti-wind net.The gust loading factor is interrelated with the character of structure and design feature.And to calculate the wind load,the wind velocity correlation along longitude must be consider.