We report a new type of ultraviolet(UV) CCD optical multi-channel analyzer and its application for detecting solar ultraviolet irradiance spectrum. Primary analysis on detection results of solar UV irradiance spectrum indicates that in the morning and in the afternoon the irradiance of solar UV is smaller than that at noon, and reverse correlates to the change of solar zenith angle (SZA). Radiation of different bands are different: long-wave radiation is generally higher than short wave radiation. Solar UV radiation spectral intensity is bated by the effects of clouds, and the attenuation depends on the wavelength and decreases with decreasing wavelength. UV-CCD optical multi-channel analyzer can be used to monitor the total amount of solar UV radiation, and to analyze the amount of radiation at all wavelengths and the relative charges of radiation at different wavelengths in different atmospheric conditions.