The radiometric calibration for UV-ICCD was investigated to build the relationship between the input irradiance and the digital output.The theory of radiometric calibration was derived and the radiometric calibration of the UV-ICCD was implemented based on spectral irradiance standard deuterium lamp with uncertainty of 5% calibrated by NIST in a laboratory.Under the conditions of fixed MCP gain and fixed integration time,the response of the UV-ICCD was tested and the relationship of the response and the MCP gain was studied.The preliminary analysis of calibration data shows that the response of UV-ICCD is linear and the MCP gain is directly proportion to the average grey value of image.Finally,the uncertainty influencing the calibration results was analyzed,the analysis shows the maximal uncertainty is 7.94%,which can meet the calibration requirement less than 10%.