Abstract: Arched corrugated steel roof is often used for storage buildings because of its low cost and shorter construction time.The related technical regulations was carried out until 2005 because of the limited research,and collapse accidents were occurred frequently in China because the unified methods were not existing before this time.A typical accident was analyzed based on different calculate methods,wind load and wind dynamical action were also discussed.The collapse was mainly because of the wind load and wind dynamical action.The wind load value should be considered according to the structure location.The methods which the regulations adopted are safe,it can be used in practice.