The wider visible frequency range of GMS-5 satellite provides wonderful information for calculating solar radiation to reach the earth surface. First,the feasibility of estimating solar radiation using GMS-5 visible channel data is analysed,and the corresponding method of processing satellite data is given.Then,the statistical relation between the visible albedo and solar irradiance is established , and the estimating model of dekad solar radiation is also discussed. Through the comparison of dekad solar radiation estimating result with actual observation data ,the mean square error is 7.7MJ·m^-2,the mean relative error is 3.4%.