The steel structure of light housing with portal rigid frame is sensitive to wind load. In the actual design process, the design of inter-column support is often ignored,having hidden dangers to the structural safety. In this paper, the wind load calculation formula is modified based on the current general norms, and the theoretical calculation method of the stroke load factor in the calculation process of the inter-column supported wind load is briefly described,and the wind load calculated by the empirical value is compared and analyzed. Finally, the actual calculation example of the inter-column supported wind load of a project is verified. The results show that the effect of wind load amplification factor should be considered according to the requirements of the General Code for Engineering Structures on the basis of the current method of calculating the stroke load in the Technical Code for Steel Structures of light houses with rigid frame. There is little difference between the empirical value of the wind load factor and the theoretical value of the wind load,and the former is more conservative. In view of the convenience of the empirical value, designers can use the empirical value for practical project design.