Solar ultraviolet (UV) spectral monitor (SUSM) is a compact, high-precision satellite-borne spectroradiometer designed to measure the solar ultraviolet-spectral irradiance and the solar backscatter vltraviolet-spectral radiance from the atmosphere under two different work modes. The calibration setup is presented. A spectral irradiance standard lamp directly illuminates the diffuser of the solar ultraviolet spectral monitor to calibrate the solar ultraviolet spectral monitor spectral irradiance responsivity and a standard diffuser illuminated by the standard lamp as Lambert surface source is used to calibrate the solar ultraviolet spectral monitor spectral radiance responsivity. The measurement error analysis shows that the 160～250 nm spectral irradiance calibration error is 6.5%, the 250～400 nm spectral irradiance calibration error is 4.3% and the 250～400 nm spectral radiance calibration error is 5.9%. The data of solar ultraviolet spectral irradiance and the solar backscatter UV spectral radiance obtained by solar ultraviolet spectral monitor agrees with the internationally published data within ±10%.