Because the aerodynamic constructure of the aero air total temperature thermocouple is complicated, its calibration is always not yet decided. Owing to the thermo-electric property move and the matching character change of the thermocouple after being made, the matching calibration is necessary. In this paper, after emphasizing the above problems, the STT - 1A series total temperature thermocouple calibrator wining national patent and developed by myself is introduced.