According to the environment characteristics and corrosion depth distribution law of the naval aircraft structures fatigue notch factor (K_f) and fatigue life mathematical model was built by using the Stress Field Intensity (SFI) and Local Stress-strain methods. In this paper, a method for evaluating service life of aircraft structure under corrosive condition was developed. On the basis of the evaluation result under room temperature and air, and taking into consideration the influences of corrosion depth in the ground environment and corrosion fatigue in flight environment of the humidity air, salt fog, salt fog + SO₂ this method made correction for fatigue life. Finally, combing with a real case of fatigue life and residual life prediction of the flange for the aircraft wing, this calculating method was appraised.