Ultrahigh-temperature temperature sensor calibration system

The invention discloses an ultrahigh-temperature temperature sensor calibration system. The working temperature is 20-2800 DEG C. The calibration system is characterized by comprising a sealed cavity,an environment control unit, a graphite soaking block, a heat source unit, a temperature measuring unit and a main control unit. A laser transmission lens for allowing external laser to enter is arranged on the sealed cavity; the graphite soaking block and the temperature measuring unit are arranged in the sealed cavity; the graphite soaking block is arranged in the irradiation range of the lasertransmission lens; the temperature measuring unit is used for detecting the graphite soaking block, the heat source unit is arranged outside the sealed cavity, the heat source unit heats the graphitesoaking block in the sealed cavity by emitting laser to penetrate through the laser transmission lens, and the environment control unit, the heat source unit and the temperature measuring unit are all electrically connected wi