In　this　work,　a　paraelectric　complex　perovskite　Ba(Zn1/3Nb2/3)O-3　(BZN)　was　introduced　into　the　morphotropic　boundary　composition　(Bi0.5Na0.5)(0.93)Ba0.07TiO3　(BNBT)　to　modulate　the　phase　structure　and　electrical　properties　as　well　as　the　field-induced　strain　behavior.　Using　a　columbite　route,　the　ceramics　with　pure　perovskite　structure　were　successfully　fabricated.　The　structure　and　electrical　measurements　showed　that　the　introduction　of　BZN　into　BNBT　results　in　the　decrease　of　the　rhombohedrality　90-g,　and　promotes　the　evolution　from　ferroelectric　to　antiferroelectric　(AFE)　relaxor.　Besides,　the　introduction　of　BZN　induces　the　volume　increase　and　dimension　reduction　of　the　nanosized　AFE　relaxor　domains.　A　large　field-induced　strain　of　0.39%　with　good　stability　against　frequency,　field,　and　temperature　was　obtained　at　the　BNZ　addition　of　composition　x　=　0.01,　which　locates　at　the　critical　composition　boundary　between　ferroelectric　state　and　AFE　relaxor　state.