With the development of optical remote sensing technology, spectral radiometric calibration got more and more attention. Currently, the integrating sphere is the main tool to make radiometric calibration in ultraviolet and visible band. However, the integrating sphere cannot output the monochromatic light, and the stability of the output is not enough. In order to solve these problems, we propose a new method of absolute spectral irradiance source based on double Féry subtraction structure. With the design and simulation of Zemax, the spectral range of the new spectral irradiance source is 240~2400 nm; and the spectral bandwidth at 350, 600, 1000 nm are less than 3, 9, 29 nm respectively; the uniformity of the output is less than 1.9% within Ф50 mm or 1.4% within Ф30 mm; the degree of the polarization is less than 0.7% in full aperture. The new irradiance source can be used to measure the spectral response and geometric calibration of the detector or remote sensing instrument in a wide range of spectra. The new radiation source used with polarizers can be used to measure the polarization response of instruments. Which has a wide range of applications.