The complicated oceanic atmosphere may conduce to the air wake in ships’ cruising inevitably. In order to ensure the aircraft safe approaching, establish model and simulate air wake in aircraft’s approaching. Analyze the air wake in ship cruise, based on the correlative instructions of the air wake’s components in American military specification, establish the models and simulate the sub-components. Then the complete disturbance model is established. Through computer simulation, the velocity of disturbance of air wake in horizontal and vertical directions are acquired. The research can provide reference to ship aircraft approaching control system.