Ce(SO4)2-doped phosphosilicate gel was prepared by mechanical milling.Complex impedance analysis proved that the 15 h-ball-milled sample showed a maximum conductivity of 2.97 S/m at 130 ℃,which is about 40％higher than that of the sol-gel-prepared sample with the same compositions.NMR results proved that the ball-milled samples contained more Q1 structural units helpful to an increase in both proton conduction and chemical durability.