In view of the problems existing in the calibration of radiation thermometers, a high repeat precision calibration device for radiation thermometers is proposed. By introducing the structure and using method of the device, this paper expounds that it has higher flexibility and generality to fix the thermometer to be tested by using elastic clamps, and that the way of "one thermometer with one set of clamp and one calibration bench to be shared" has higher mechanization degree and working efficiency. The test and test results show that the device has high repeat precision.