The utility model relates to a black silicon spectral characteristic detecting platform. A protium lamp, a tungsten lamp, a monochromator, a lens, a sample chamber for detecting transmitted light, a sample chamber for detecting reflected light, and an integrating sphere are fixed on an optical platform in sequence, wherein a light passing opening and a detecting opening are formed on the integrating sphere; the sample chamber for detecting the transmitted light and the sample chamber for detecting the reflected light are respectively connected with the light passing opening of the integrating sphere; a photomultiplier, a gallium and indium arsenide detector and a lead sulfide detector are respectively connected with the detecting opening of the integrating sphere; optical signals are integrally collected into the sample chambers by the integrating sphere; and then the optical signals respectively enter the photomultiplier, the gallium and indium arsenide detector and the lead sulfide detector according to a spectral range and are detected in super wide waveband ranges of an ultraviolet region, a visible region and a near infrared region in a segmented manner; and finally, the transmission characteristic and the reflection characteristic of black silicon material are analyzed qualitatively and quantitatively in the wide spectral range. The black silicon spectral characteristic detecting platform has the advantages of simple structure and accurate test result, and is convenient to use.