The　Pb(Zr0.47Ti0.53)O-3-Pb[(Ni0.6Zn0.4)(1/3)Nb-2/3]O-3　(PZT-PNZN)　quaternary　ferroelectrics　presenting　the　high　piezoelectric　coefficients　are　the　active　element　in　a　range　of　piezoelectric　devices.　However,　the　buildup　of　nanoceramics　with　stable　perovskite　structure　is　still　a　big　challenge,　which　prohibits　the　miniaturization　of　piezoelectric　devices.　In　this　work,　the　high　dense　PZT-PNZN　nanoceramics　with　average　grain　size　of　130nm　were　prepared　by　a　combination　of　high-energy　ball　milling　(HEBM)　and　spark　plasma　sintering　(SPS).　The　domain　configuration　and　relaxor　behavior　in　this　nanoceramic　are　reported　for　the　first　time.　Although　the　noncubic　crystal　structure　and　dielectric　anomaly　suggest　a　ferroelectric　behavior,　only　very　slim　polarization-electric　(P-E)　hysteresis　loops　are　observed.　The　suppression　of　macroscopic　ferroelectric　polarization　mainly　originates　from　the　decrease　in　crystal　tetragonality　and　the　enhanced　clamping　effect　on　domain　wall　motion.　The　piezoelectric　properties,　d(33)=65pC/N　and　k(p)=17%,　raise　the　possibility　of　PZT-PNZN　nanoceramics　for　application　in　multilayer　piezoelectric　devices.