In order to evaluate the shape rationality of the long-span tensile membrane building of coastal stadium, the parametric architectural design and the open-source computational fluid dynamics method are combined to develop a fast batch simulation module for the numerical wind tunnel of the steady-state atmospheric boundary layer building, which can automatically establish a computational model that considers the surrounding buildings and terrain and quickly evaluate the mean wind pressure distribution of complex membrane building. The interference of the bottom stand, surrounding terrain and buildings on the net wind pressure distribution of the membrane surface and the influence of different shape parameters of tensile membrane on the wind load of the building are quantitatively analyzed. The results show that the simulated results of mean wind pressure on the membrane surface are consistent with the wind tunnel test; the audience stands at the stadium bottom will change the net wind pressure distribution on the membrane surface and significantly increase the negative wind pressure; by locally adjusting the shape parameters of tensile membrane, the maximum wind pressure coefficient and the overall wind load can be significantly reduced. This study can provide a reference for the design of similar membrane shapes. It is recommended that the influence of surrounding buildings should be considered when evaluating the rationality of the membrane shape scheme，and wind tunnel tests and computational fluid dynamics methods are advised to determine the wind load.