The spectral distribution of the Hefei synchrotron radiation was determined in 200～350 nm, by comparison with the D2-lamp with MgF2 windows, which is a radiometric transfer standard source of NPL. Within experiments error, a good agreement was found between experimental results and value predicted by the theory of synchrotron radiation derived by Schwinger. The difference between experimental and thoretical data is less than 6% at 200 nm and 1.5% and 240 nm.