Radiation temperature error measuring device

The utility model discloses a radiation temperature error measurement device, which comprises a flat plate test piece, a standard infrared temperature measurement combination, an infrared thermometer to be detected, a first heater and a second heater, wherein two cylindrical cavities are formed in the flat plate test piece, one cylindrical cavity is a first equivalent black body, and the other cylindrical cavity is a second equivalent black body; the standard infrared temperature measurement combination is arranged on the outer side of the flat plate test piece; the first heater is arranged on one side of the flat plate test piece, the second heater is arranged on the other side of the flat plate test piece, the first heater is opposite to the second heater, and the first heater and the second heater are used for heating the flat plate test piece; the infrared thermometer to be detected is arranged on one side, far away from the flat plate test piece, of the second heater. According to the invention, the inte