The Photostimulated luminescence(PSL)of BaFCl:Eu2+ phosphors was studied through changing the energy of UV-irradiation.There appears distinct difference between PSL for the energy of UV-irradiation being larger or smaller than that of Eu2+ excitation.Meanwhile the reason accounting for the above difference was discussed and the dependence of the energy of UV-irradiation on the F/CI ratio was given.