Because the air wake fields of large ships have a great influence on the safety of aircraft landing, therefore, the effective technologies to guarantee the safety of aircraft and maritime activities are of great significance. The CFD(computational fluid dynamics) method was used to study the air wake field characteristics of large ships and the prevention and control technologies. The Reynolds averaged Navier-Stokes equations with Spalart-Allmaras turbulence model were used to construct simulation platform, the numerical modeled work was carried out through the platform. The regular and characteristic of air wake fields of large ships were analyzed. Furthermore, the new prevention and control technologies of air wake field of large ships were proposed, and the theoretical basis, center method and technical proposal were expounded. According to the thinking and theory of active blowing prevention and control technology, numerical modeling method was used to test the new prevention and control technologies of air wake field of large ships. Numerical results show that the new method can significantly improve the quality of the air wake field, make the flow field stable and uniform, and hence it can reduce the impacts on the aircraft landing on large ships. After the method is further improved, the engineering application can be realized to ensure the safety of aircraft landing on ships, potentially.