Abstract: The study of solar spectrum is of profound significance to science and human society. According to this requirement, the satellite-borne solar imaging spectrometer designed in accordance with this requirement has a low signal-to-noise ratio and a large uncertainty after calibration of the radiance response directly on the ground, so it is difficult to achieve accurate measurement of the radiance response. Therefore, the solar radiance hyperspectral responsivity calibration system is constructed in this paper to test the whole system radiance responsivity. The calibration accuracy of the solar imaging spectrometer calibration test is improved, the dynamic range is improved by 2.8 times, and the extended uncertainty can reach 4.60%. Compared with the results of direct calibration, the signal-to-noise ratio of solar imaging spectrometer calibration test is significantly improved, and the requirements of solar imaging spectrometer calibration are met.