With the application of hyperspectral camera in precise measurement of background radiation in specific areas and bands,the requirements on the accuracy and resolution of the camera’s radiation calibration are constantly increased.In this paper,by measuring the filter transmittance and DN value of integrating sphere,the percentage of the energy transmitted from each band is obtained.Combined with the percentage and intensity of each wave band,the relation between intensity and the DN value of the camera detector is established.so far,the radiation calibration has been completed.In the paper,to improve calibration resolution of the hyperspectral camera is converted to improve wavelength measurement resolution of the filter transmittance,which simplifies the research process.The calibration results show that,when the wavelength changes in a small range,the gain coefficient of the hyperspectral camera changes.