Abstract: The long-term stable operation of wind turbines and the delay of component aging are greatly affected by the wind turbine cover. Extensive investigation and research have been conducted to address issues such as rain leakage and high costs in wind turbine enclosures within the industry. Solutions have been proposed to improve sealing performance, reduce production and manufacturing costs, and achieve lightweight enclosures. The solution proposed in this article is elaborated in detail in two parts: key points of structural design and application cases of structural design, which can provide reference and inspiration for practitioners. Through investigation and research, it is believed that there is still significant room for development in terms of performance improvement, modularization, and lightweighting of wind turbine casings. Optimizing the design of composite material structural components, modular cover mold design, and reducing the weight of composite materials are the mainstream directions for the development of wind turbine covers.