The relative spectral distribution of synchrotron radiation emitted by Hefei 800 MeV electron storage ring was measured in 300～800 nm range, by using quartz tungstan halogen lamp spectral irradiance working standard source. The polarization and the angular distribution were investigated at 405 nm. Within the experimental error, a good agreement was found between experimental results and values predicated by theory of synchrotron radiation derived by Schwinger. The difference of relative spectral distribution and the polarization is less than 5%.