Abstract: By MS-800 model precision spectral pyranometer and 7 sensors with hemispherical filters of various spectral bands , the spectral distribution of solar radiation were measured dur ing 1987-1988 in Beijing P.R.C Based on the observation data obtained , the radiation energy distribution in various spectral bands and its seasonal change were analysed , the effects of the solar elevation and cloud amount were discussed , and the related formula between the spectral radiation and global radiation were expressed.