Based on the measurements of ultraviolet(UV)radiation during 2005-2012 fromChinese Ecosystem Research Network(CERN)and global radiation during 1961-2010 fromChina Meteorological Administration(CMA),an empirical UV estimated model and a hybridmodel were used to reconstruct the historical daily UV radiation.The empirical UV estimatedmodel were introduced by analyzing the dependence of UV irradiation on clearness index(Ks,theratio of the total irradiance to extraterrestrial solar irradiance)and the solar elevation angle underany sky conditions in each typical station.The hybrid model considered 6 attenuations in solarradiation transferring process,such as Rayleigh scattering,aerosol extinction,ozone absorption,water vapor absorption,permanent gases absorption and cloud extinction.The results indicate that:88%of mean bias error(MBE)values are between-0.08 to 0.08,94%of root mean square error(RMSE)values are less than 0.12 and 90%of correlation coefficient(R)values are larger than0.95 for the empirical UV estimated model; The special distribution and the long-term variation ofthe monthly mean daily values between the modeled and observed solar radiation are similar.87%of MBE values are between-1.50 and 1.50,96%of RMSE values are less than 3.5 and 92%of Rvalues are larger than 0.90 for 99 CMA radiation stations from 1993 to 2010; The lower UVradiation is in the eastern,central and parts of southeast of China and higher value is in thewestern part,especially in Qinghai-Tibet Plateau; UV radiation in Qinghai Tibet Plateau increasesfrom 1961 to 1978 and then declines slightly,while in other regions and entire China UV radiationdecreases from early 1960s to late 1980s but then slows down and reaches a steadily low levelsince 1990s.