The　fine-grained　xPb(Zn1/3Nb2/3)O-3-(1　-　x)Pb(Zr0.47Ti0.53)O-3　system　has　been　prepared　from　submicron　precursor　powders　obtained　by　highenergy　ball　milling　method.　The　addition　of　PZN　induces　a　decrease　of　grain　size　from　an　initial　micron　scale　to　a　submicron　scale,　accompanying　with　the　phase　transition　from　tetragonal　to　morphotropic　phase　boundary　(MPB),　and　then　rhombohedral　side.　Interestingly,　compared　to　the　former　published　data　for　coarse-grained　ceramic,　the　MPB　has　shifted　from　50%　to　30%　PZN　content　side　due　to　the　enhancement　of　the　internal　stress　for　fine-grained　ceramic.　The　enhanced　electrical　and　mechanical　performances　are　closely　associated　with　the　phase　structure　and　grain　size.　A　high　piezoelectric　property　(d(33)　=　380　pC/N　and　k(p)　=　0.49)　as　well　as　mechanical　performance　(H-v　=　5.0　GPa　and　K-IC　=　1.33　MPam(1/2))　were　obtained　simultaneously　for　the　MPB　0.3PZN-0.7PZT　ceramics　with　an　average　grain　size　of　0.65　mu　m.　(C)　2014　Elsevier　Ltd.　All　rights　reserved.