The traditional chimney structure with wind break ring can effectively control the wind vibration. As a new structure, steel desulfurization tower is arranged with different forms of wind break ring to explore whether it can change the wind pressure distribution of the structure, reduce the wind vibration response, and ensure the safety performance of the structure. Based on the numerical wind tunnel simulation method, the finite element software Fluent is used to simulate the structure of steel desulfurization tower. By changing the length, width and height of the wind field, the appropriate wind field is selected for numerical wind tunnel simulation. The spiral plate type and vertical plate type wind break ring are arranged on the upper part of the structure. The influence of different types of wind break ring on the wind pressure distribution of steel desulfurization tower is studied by changing its width and thickness parameters. The results show that the influence of wind field size effect can be eliminated by selecting the appropriate wind field size; the wind break ring can significantly improve the wind pressure distribution of the upper structure, and then reduce the dynamic response of the structure under the wind load.