Abstract: The predicting method and formula for determining calendar repaired period and total calendar life of aircraft are researched to meet the needs of determining calendar life of aircraft and the results related to them are given. As long as the used corrosion environment spectrum of aircraft, the T-H curve of corrosive materials, the number of year λ set for freely corroding up to critical damage D_c, the number of year λ_m set for available anticorrosive layer at a time and the repaired times of aircraft n are given, the calendar repaired period and total calendar life of aircraft can be determined.

Key words: aircraft, calendar life, calendar repaired period