High-precision temperature difference type outfield calibration blackbody radiation source

The invention provides a high-precision temperature difference type outfield calibration blackbody radiation source which comprises a blackbody radiation structure subsystem, a temperature control subsystem and an outfield portable packaging box subsystem, and the blackbody radiation structure subsystem and the temperature control subsystem are located in the outfield portable packaging box subsystem. The temperature control subsystem is connected with the blackbody radiation structure subsystem to control the blackbody radiation structure subsystem to perform blackbody radiation; the black body radiation structure subsystem comprises a metal radiation plate, a heating piece and heat preservation glass fiber reinforced plastic, the metal radiation plate and the heating piece are oppositely arranged, the heating piece is connected with the temperature control subsystem, and the heat preservation glass fiber reinforced plastic is located between the metal radiation plate and the heating piece and the external f