The effect of fluorides (MgF 2 + LiF [MLF] and CaF 2 + LiF [CLF]) on microstructure and electrical properties of 0.68Pb(Mg 1/3 Nb 2/3 )O 3 -0.32PbTiO 3 (PMNT) ceramic was investigated. The results showed that the MLF sample exhibits a typical liquid phase sintering character, and the fluorides added PMNT ceramics exhibits a typical relaxation character, which may be ascribed to the difference of ionic radius and fluorides addition. The values of d 33 and K p for sample MLF arrive to 583 pC/N and 55%, respectively, which are far lager than those of pure PMNT sample (326 pC/N and 46%) and CLF sample (54 pC/N).