Abstract: A simulation test on the wind load characteristics of South China type single span plastic greenhouse was conducted. The distribution regularities of the structural shape coefficient of wind load on the roof and wall of greenhouse are introduced. The influence of wind load on the column and roof windows are discussed. The wind tunnel test results show that the distribution of wind load on the greenhouse are different from one of the architecture standard because of the columns and roof windows. The wind loads are concentrated on the columns and roof windows. The wind loads when β=90° are the basis of wind load design. The brace may be used in the ends of the greenhouse or the strength of frame may be increased.